Four lanterns sat on a card table at a Saturday garage sale in Lansdale, Pennsylvania, three of them the familiar green, one with a rust-freckled red tank. The seller had them all marked $40 "as-is." To put a real date on any Coleman lantern, you turn it over and read the numbers pressed into the bottom of the fuel fount — the round tank the whole lantern sits on. On anything Coleman built after 1951, the left number is the month and the right number is the year, so a fount reading "3 55" was filled and stamped in March 1955. The red one carried exactly that stamp, and it was a single-mantle 200A — the model collectors chase — sitting a foot away from three green double-mantles worth about $50 each.
That difference is the whole reason to flip a lantern before you buy it. The date is almost always right there in the metal, but the format flipped twice over the decades, and people routinely misread a lantern by twenty years or dismiss a genuinely collectible tank as a common camp light. Coleman stamped month and year into nearly every fount from the 1920s onward, and once you know which era used which format, you can bracket most lanterns to a single month without guessing.
Flip It Over: Where the Date Lives and What "3 55" Means
The date is not on the ventilator, not on the globe, and not on a paper label that fell off in 1970. It's embossed into the bottom of the fount, stamped there when the tank left the assembly line, and it survives everything short of the tank rusting through. Tip the lantern up, wipe the base with a rag, and look for two figures separated by a space or a small gap.
For any lantern made from late 1951 forward, read it left to right as month then year. A stamp of "3 55" is March 1955. "11 62" is November 1962. "7 73" is July 1973. Only the last two digits of the year appear, so you supply the century from context — no Coleman pressure lantern from 1855 is going to turn up at a yard sale, and the model number settles any ambiguity anyway. A 200A stamped "8 68" is August 1968, full stop.
Two things trip people up. First, a single digit month has no leading zero, so "3 55" is not "35" and then "5" — it's month 3, year 55. Second, some founts show the stamp faint or double-struck, and grime hides it; a pass with a nylon brush and a raking flashlight beam usually brings it up. If the fount base is genuinely blank, the tank was likely replaced at some point, which matters for value because a 1955 lantern wearing a 1971 fount is a parts-swap, not an original example. The green 220-series lanterns from that Lansdale table each read a clear month-year on the base, and every one landed in the mid-1960s to mid-1970s window that makes them common. The date does more than satisfy curiosity — it tells you whether the tank belongs to the rest of the lantern.
The stamp also does something a paper label never could: it survives cleaning, repainting, and decades of storage without lying about the tank's birthday. A reseller can spray a fount fresh red and call a lantern "restored to 1950s condition," but the embossed month-year underneath doesn't move. Read it before you accept any date a seller offers out loud, because the two frequently disagree. A tag reading "1940s Coleman" on a fount stamped "6 61" is a 1961 lantern with an optimistic tag, and the metal wins that argument every time. This is the single check that separates buyers who know the model from buyers repeating what the seller told them, and it costs you thirty seconds and a wiped rag.
When the Numbers Are Reversed: Pre-1948 and the A/B Code Years
Read an older fount the same way and you'll misdate it by two decades, because Coleman ran the numbers backward before the war and used letters in between. From roughly 1924 to 1947, the stamp is year then month — the reverse of the modern layout. A pre-war fount reading "29 4" is not the 29th year of something; it's 1929, month 4, or April 1929. The bigger number sits on the left in this era precisely because it's the year, which is the quickest way to know which format you're looking at: if the left figure is too large to be a month, you're in the reversed pre-1948 system.
Between those two eras Coleman used an alpha-numeric code, and this is where most misreadings happen. From about 1947 into 1953, founts carry a letter paired with a number, and the letter marks the half of the year. A stands for the first half, January through June; B stands for the second half, July through December. The number beside the letter is the year. So a fount stamped in this window tells you a six-month range rather than a single month — narrower than nothing, wider than the later month-year stamps. Canadian-built lanterns extended the scheme with C and D letter codes on top of the A and B you see on US tanks, so a lantern wearing a C or D code is pointing you toward a Canadian factory as much as a date.
Why the extra work matters comes down to a common misread. The alpha-code lanterns from 1947 to 1953 sit right at the boundary where truly early postwar Coleman lanterns start, and a buyer who can't parse an "A" or "B" stamp either ignores the code entirely — treating a dated lantern as undatable — or reads the year digit as a modern one. A fount stamped "B 50" is the second half of 1950, a lantern more than seventy years old, not a 1990s camp light. Getting that letter right is what tells you whether you're holding a genuine early-postwar example or a much later one, and the six-month resolution it gives is enough to place the lantern firmly against Coleman's model timeline.
The practical move is to identify the era first, then read the stamp. Big-number-first means pre-1948 and year-leading. A letter in the stamp means the 1947–1953 transition and a half-year read. Two plain numbers with a small left value means post-1951 month-year. Getting the era right is the difference between calling a lantern a 1949 and calling it a 1994 — a mistake that turns a genuinely early postwar tank into a supposed camp-store leftover, or the reverse. Collectors who date cast iron by foundry marks run the same discipline; the logic of reading the object's own stamps before trusting a seller's story is the same one laid out in the cast iron skillet dating guide, where an unmarked pan's era hides in the casting rather than a label.
The 200A "Red Lantern" and Why the Fount Color Matters
The model that turns heads is the single-mantle 200A, and its color is the fast tell across a crowded flea-market table. Coleman introduced the 200A in November 1951 and ran it for thirty-two years, until September 1983 — one of the longest production runs of any Coleman lantern. For most of that life it wore a distinctive red-painted fount with a matching red porcelain ventilator up top, the combination that earned it the nickname "the red lantern." That red-on-red look was made from 1951 into 1979.
Then Coleman switched it to green. From 1979 until the September 1983 finish, the 200A came with a green-painted fount and a green porcelain ventilator, which is why a green single-mantle 200A exists at all and why it's the less-wanted variant. A collector scanning a table reads color before model number: a red tank on a single-mantle lantern flags a 200A from the desirable 1951–1979 stretch, while a green single-mantle 200A marks the 1979–1983 tail. Confirm with the fount date — a red 200A stamped "3 55" is a mid-1950s example squarely in the sought-after era, exactly the lantern hiding under a generic "as-is" price tag.
The mid-1950s red founts draw the most attention, and condition of that red paint drives the money more than almost anything else on the lantern. A crisp, glossy red tank with an unchipped red ventilator sits well above a faded, rust-bloomed one, because the color is the entire appeal. Watch for a swapped ventilator, too: a red fount capped with a green ventilator is a mismatch someone assembled from parts, and it reads as wrong the moment you know the model shipped red-on-red through 1979. The 200A rewards a careful look precisely because so many sellers file it next to the common green lanterns and price it the same.
Confirm the model before you get excited about a red tank, because the 200A is a single-mantle lantern and the color alone isn't proof. Look at the burner assembly: one mantle, not two. The paired two-mantle green lanterns are the 220 and 228 commons, and no amount of red paint would turn one into a 200A. Once you've confirmed a single mantle and a red-on-red finish, the fount date sorts the desirable years from the tail — a "3 55" or a "9 62" puts you deep in the red-lantern era, while a green single-mantle 200A stamped in the early 1980s is the version that Coleman built as the model wound down to its September 1983 end. Match the mantle count, the color, and the date, and you've identified the lantern without trusting a word on the price tag.
The Common Green Double-Mantles: 220, 228 and Realistic Money
Most of the green lanterns you'll ever see are 220 and 228 double-mantles, and they're common because Coleman made an ocean of them. These are the two-mantle camp lanterns that lit family tent sites from the 1950s through the 1980s, sold by the millions, and stored by the thousands in basements and garages until they surface at estate sales. Their sheer numbers are the reason they stay cheap, and knowing the realistic range keeps you from overpaying for a lantern that was never scarce.
A clean, working 220 or 228 in ordinary green realistically brings around $50. The broader spread runs roughly $45 to $225, with the low end for tired-but-complete examples and the top reserved for early or unusually clean pieces with the right globe and case. Plenty of rough ones — dented, missing the globe, gummed up — change hands for $10 to $15, and a steady supply of new-old-stock lanterns still in the box keeps a ceiling on even the nice ones. When a seller wants $150 for a scuffed 228 "because it's vintage," the date stamp and the model number are your argument: a 1972 double-mantle common is a $50 lantern on a good day.
What lifts a green double-mantle toward the upper part of that range is completeness and correctness, not age alone. The correct-year globe matters — a Coleman globe carries its own markings, and a replacement globe from the wrong decade drags a lantern down for a buyer who wants originality. An intact carrying case, the original ventilator, unbent frame, and a fount that dates to the same era as the rest of the lantern all push a 220 or 228 to the good end of common. None of that makes it rare. It makes it a clean example of an ordinary lantern, which is a $50-to-$80 proposition rather than a $200 one, and reading the fount date is how you keep that distinction straight when a seller insists otherwise.
The double-mantles reward date-reading in one more way: they let you spot a mismatched build fast. A 228 whose fount stamps "5 71" but wears a ventilator or globe from a different decade is a lantern someone rebuilt from a parts bin, and while it still lights, it isn't the original example a collector pays a premium for. Handle enough of them and the tells become quick — the frame paint should roughly match the fount, the globe markings should sit in the same era as the stamp, and the pump knob and cap should look like they've aged alongside the tank rather than arriving new last year. A lantern that reads consistent across all its parts is worth more than the sum of a cobbled-together one, even when both say 228 on paper. The point of the fount date on a common green lantern isn't rarity — it's the anchor you check every other part against.
Wartime and Canadian Variants: 242 Nickel vs. Painted Founts
Older and scarcer than the postwar green commons is the 242 family, a single-mantle line Coleman built from 1932 onward, and its founts come two very different ways. The run breaks down across the 242 (1932–1935), the 242A (1935–1936), the 242B (1936–1942), and the 242C (1941–1950), which carries the family across the wartime years. On these lanterns the fount finish itself is a value driver, because both the 242B and the 242C were made with a bright nickel-plated fount as well as a green-painted fount.
The nickel-plated founts are the ones collectors single out. A mirror-bright nickel tank on a 242B or 242C is the finish that photographs well and sells above the painted equivalent, and it's also the finish that shows its wear plainly — nickel flakes, spots, and hazes over time, so an unblemished plated fount is genuinely harder to find than a serviceable green-painted one. When you turn a 242 over, note both the date stamp and whether that tank is plated metal or paint over metal, because a nickel 242C and a green-painted 242C are the same model at different prices.
Canada complicates and enriches the picture. Coleman's Canadian factory produced its own 242 variants — models designated D and E beyond the US lineup — and Canadian tanks carry the C and D date-code letters mentioned earlier, so a Canadian 242 can be flagged by both its model designation and its fount stamp. Collectors do report a light green painted fount on some Canadian 242B lanterns that gets called "seafoam" in forum and marketplace discussion, though Coleman's own production records simply list the finish as green paint rather than naming a seafoam color. Treat "seafoam" as collector shorthand for a distinctive light-green painted 242, not an official factory designation — the safe way to describe such a fount is a light-green painted Canadian variant, dated by its stamp and identified by its model number. Either way, a Canadian 242 with a documented variant and a matching-era fount is a more interesting find than another green postwar double-mantle, and the letter code on the base is part of what proves it.
Clean, Don't Kill: Restoration That Preserves Value
The instinct to make an old lantern gleam is exactly where collectors lose money. In the Coleman collecting market, an original finish carries the premium, and a fount stripped to bare metal, wire-wheeled, and repainted a hardware-store red almost always sells for less than the same lantern left honestly worn. Over-polishing a nickel 242 fount cuts through what plating survives and takes the value with it. Repainting a red 200A tank a shade off from Coleman's original destroys the very originality a buyer is paying for. This is a market preference, not a physical law, and it's a strong one: the people who pay the most for these lanterns want to see the factory finish, dings and all.
That doesn't mean leave a lantern to rot. Cleaning and preservation are different from refinishing, and the line between them is what protects value. Wiping decades of grime off a fount with a rag and mild soap, clearing a clogged generator, replacing a rotted pump leather, fitting a fresh mantle, and swapping a cracked globe for a correct-era Coleman replacement are all normal, expected maintenance that make a lantern usable without erasing its history. Stripping the paint, buffing the nickel to a chrome shine, or coating the tank in modern enamel are the moves that turn a $200 collectible into a $60 shelf-sitter. Function-restoring work helps; finish-erasing work hurts.
The judgment call comes with a genuinely destroyed lantern. A tank eaten through with rust or a fount whose paint is 80 percent gone is a different case, and a sympathetic refinish can make sense for a piece too far gone to preserve — the collecting community argues both sides of exactly this line. The safe default for anything with an intact original finish is restraint: clean it, fix what makes it light, and stop. The International Coleman Collectors Club at intlccc.net maintains model and date references worth checking before you touch a lantern, and its members are the same buyers whose preference for original finish sets the market. When you're deciding whether a lantern is worth restoring at all or better sold as-is, the calculus of restoration cost against resale runs the same way it does across categories in the antique restoration guide, and the honest answer is often to sell it untouched.
Quick Reference: The Fount Date Decoder
Read the era first, then read the stamp. The format tells you which system you're in before the numbers mean anything.
| What the fount stamp looks like | Era it points to | How to read it |
|---|---|---|
| Two numbers, small value on the left (e.g., "3 55") | Late 1951 onward | Month then year — "3 55" is March 1955 |
| Two numbers, large value on the left (e.g., "29 4") | ~1924–1947 | Year then month (reversed) — "29 4" is April 1929 |
| A letter with a number (A or B + year) | ~1947–1953 | A = first half (Jan–Jun), B = second half (Jul–Dec) of that year |
| A letter code with C or D | Canadian production | Canadian factory dating, cross-check the model number |
| No stamp at all on the fount base | Replaced tank | The fount likely isn't original to the lantern |
$30 Lantern or $300 Lantern: What Moves the Needle
Two lanterns can wear the same green paint and sit a decade apart in value. These are the cues that push a Coleman toward the bottom of its range versus the top.
Drags it toward the $30–$50 floor:
- A common green 220 or 228 double-mantle from the 1960s–1980s, however clean
- A green-painted single-mantle 200A from the 1979–1983 tail
- Missing or wrong-era globe, missing carrying case, bent frame
- A repainted fount in a shade that doesn't match Coleman's original
- A nickel fount buffed through to bare metal by over-polishing
- A parts-swap lantern whose fount date doesn't match the rest of the build
Lifts it toward the top of its range:
- A red-fount 200A from the desirable 1951–1979 red-on-red years, especially crisp mid-1950s paint
- A nickel-plated 242B or 242C fount with the plating intact
- A documented Canadian 242 variant with a matching letter-code fount stamp
- The correct-year Coleman globe, original ventilator, and intact case all present
- An honest original finish rather than a refinish — worn but unmolested
- A clear, matching fount date that confirms the lantern is all-original
Where you take a lantern to sell shapes the price as much as the lantern does. Camp-lantern buyers cluster in collector forums and dedicated groups where a red 200A or a nickel 242 finds its true audience, while a common green 228 does fine at a local sale — the venue math for matching an item to its buyers is the same one worked through in the guide to selling antiques locally. The same discipline that dates a lantern by its own stamps rather than a seller's story — the habit collectors of marked cast iron practice when they read a Griswold logo era off the pan — is what keeps you from paying $150 for a $50 lantern or walking past a red-fount 200A priced like a common green camp light.