Marathon lists 4 current models on its own site, $550 for the quartz Navigator to $2,000 for the GSAR diver, and every one carries tritium gas tubes. It sells direct, so the street price and the list price are the same number, which is rare at either end of that range.
Checked 20 September 2026 · list prices on the maker's site that day unless marked street
Marathon sells direct from marathonwatch.com. No discounter was fetched at check, and the street price recorded for every model is the list price. The catalogue here is the 4 models the site listed on 19 September 2026 with a full spec: the Navigator in CeraShell, the General Purpose Mechanical in a 34 mm fibreshell case, the Officer's Mechanical in 36 mm parkerised steel, and the 41 mm GSAR automatic diver. Older fibreshell Navigator pages in sage and desert returned 404 at check, so they have no row; the NAV-D, which adds a date to the Navigator, is a variant rather than a line. Our data holds no founding date, home town or assembly site for the brand, and this page states none.
Three things the spec sheets settle. Every model has a sapphire crystal and tritium gas tubes for the lume, which glow without charging from daylight; the Officer's and the GSAR add MaraGlo paint on top. Lug width follows case size: 16 mm on the 2 GPMs, 20 mm on both 41 mm cases. Water resistance is where the 4 separate: 30 m on the GPM 34, 50 m on the Officer's, 60 m on the Navigator, 300 m on the GSAR. The GPM is built to MIL-PRF-46374G (Type II, Class 4), a US military purchase specification rather than a marketing line, and its product page gives thickness as 12.5 mm where the collection page says 11 mm; the table takes the product page.
Read the table by movement. The Navigator is quartz, an ETA F06.105 HeavyDrive, the Swiss quartz calibre made for heavier hands, and it is the only Marathon here with a rotating bezel, a bidirectional 12-hour ring in aluminium. The GPM 34 runs a Seiko NH35A automatic. The Officer's Mechanical is hand-wound on a Sellita SW210-1, no rotor, so it is the thinnest of the 4 at 10.5 mm. The GSAR runs a Sellita SW200-1 automatic behind a unidirectional 60-minute bezel and 300 m. Two Japanese calibres, two Swiss, and the price ladder tracks the case rather than the movement: the NH35A GPM at $575 costs more than the ETA Navigator at $550.
Ø41 mm · quartz · 60 m · $550 · Cheapest · quartz · 12-hour bezel
Marathon Navigator (NAV) 41 mm CeraShell quartz
41 × 48 mm · ref 40 × 47
MovementETA F06.105 HeavyDrive quartz
Case41 mm
Lug to lug48 mm
Thickness11.5 mm
Lug width20 mm
Water resistance60 m
Crystalsapphire
Bezelbidirectional 12-hour aluminum bezel
Lumetritium gas tubes
Case materialCeraShell (bio-sourced plastic + ceramic powder)
Price$550
The Marathon to buy if the tritium matters more than the movement: $550, 41 mm, 48 mm lug-to-lug, 11.5 mm thick, on an ETA F06.105 quartz. The case is CeraShell, a bio-sourced plastic loaded with ceramic powder, and the bezel is a bidirectional 12-hour aluminium ring, so it tracks a second time zone the way no other Marathon here does. Water resistance is 60 m, enough for rain and a wash, not for the pool. Unimatic's UT4 is the quartz alternative at $515 with 300 m and a steel case, 1 mm longer and without tritium. The Navigator's argument is the tubes and the material; the trade is the 60 m.
The smallest Marathon and the only one built to a stated military specification, MIL-PRF-46374G (Type II, Class 4): $575, 34 mm across, 41 mm lug-to-lug, 12.5 mm thick, on a Seiko NH35A automatic in a high-impact composite fibreshell case with a 16 mm lug. At 41 mm lug-to-lug it is the shortest of the 4 by 3 mm and will sit on a 6-inch wrist. Water resistance is 30 m, the lowest of the 4, so it is a watch for land. Traska's Commuter 34 at $630 is the steel alternative at the same size, 8.75 mm thick and 100 m, without tritium. Buy the GPM for the tubes and the spec sheet; the 30 m is the compromise.
Ø36 mm · hand wound · 50 m · $675 · Hand-wound · Sellita SW210-1
Marathon Officer's Mechanical (GPM) 36 mm steel
36 × 44 mm · ref 40 × 47
MovementSellita SW210-1 hand-wound
Case36 mm
Lug to lug44 mm
Thickness10.5 mm
Lug width16 mm
Water resistance50 m
Crystalsapphire
Bezelfixed
Lumetritium gas tubes + MaraGlo
Case material316L steel, parkerized
Price$675
The one to compare directly with Hamilton. The Officer's Mechanical is $675, 36 mm, 44 mm lug-to-lug, 10.5 mm thick, hand-wound on a Sellita SW210-1, in parkerised 316L steel with a 16 mm lug and 50 m of water resistance. Hamilton wants exactly $675 for the Khaki Field Mechanical 38, hand-wound on its 80-hour H-50, 38 mm by 47 mm and 9.5 mm thick, also 50 m. Same money, same winding, 2 mm and 3 mm smaller on the Marathon, and the Marathon includes tritium tubes and MaraGlo, which no Hamilton in our data carries. The Hamilton is 1 mm thinner and its power reserve is published; the Marathon's is not in our data.
Ø41 mm · automatic · 300 m · $2,000 · 300 m · the diver
Marathon GSAR 41 mm automatic (rubber strap)
41 × 48 mm · ref 40 × 47
MovementSellita SW200-1 automatic
Case41 mm
Lug to lug48 mm
Thickness14 mm
Lug width20 mm
Water resistance300 m
Crystalsapphire
Bezelunidirectional 60-min, fully hashed
Lumetritium gas tubes + MaraGlo
Case material316L steel, brushed
Price$2,000
The expensive one, and a different kind of watch from the other 3: $2,000, 41 mm, 48 mm lug-to-lug, 14 mm thick, 300 m, Sellita SW200-1 automatic, unidirectional 60-minute bezel fully hashed, brushed 316L steel, on a 3-piece rubber strap kit. The 14 mm is the price of the 300 m and the tubes. At $2,000 it sits with the Longines HydroConquest 41 at the same price and 300 m, and under the Formex REEF 39.5 at $2,085, which is COSC-certified and 11 mm thick on a 45.5 mm lug-to-lug. Sinn's EZM 3 at $2,410 gives 500 m and 12.3 mm on the same SW200-1. The GSAR's answer to all 3 is tritium; none of them has it.
Marathon is for the buyer who wants tritium tubes and a stated specification rather than a design, and who is content to pay list, since there is no street price to find. The GPM 34 and the Officer's at 41 mm and 44 mm lug-to-lug fit wrists from 6 inches up; the Navigator and the GSAR at 48 mm want 6.75 inches or more. Look elsewhere if you swim in a field watch, since 3 of the 4 are rated 30 m to 60 m and the Vaer C5 at $349 gives 100 m; if you want a thin automatic, since the Traska Commuter 34 at $630 is 8.75 mm against the GPM's 12.5 mm; or if you want a diver under $1,000, since Marathon's only diver is $2,000 and the Halios Seaforth IV at $765 and the Zelos Swordfish at $399 are both 200 m.
Where it sits against the field
Under $700 the Officer's Mechanical is priced to the dollar against the Hamilton Khaki Field Mechanical 38, and the choice is tritium and 36 mm against 80 hours of reserve and 38 mm. The GPM 34 at $575 has no direct rival at 34 mm; the Traska Commuter 34 at $630 is the nearest by size and is a sports watch rather than a field one, and the Vaer A5 at $599 is the 40 mm automatic field watch for the same money. The Navigator's quartz competition is the Unimatic UT4 at $515. At $2,000 the GSAR is in Longines HydroConquest and Formex REEF territory, and the Formex gives a chronometer certificate and 3 mm less thickness for $85 more.
Questions people ask
Where are Marathon watches made?
Our data does not record an assembly site for any of the 4 current models, and this page does not guess. What the spec sheets do state is the movement origin: Seiko (Japan) in the GPM 34, Sellita (Switzerland) in the Officer's Mechanical and the GSAR, and ETA (Switzerland) quartz in the Navigator. The GPM is built to MIL-PRF-46374G, a US military specification.
Are Marathon watches cheaper anywhere than the Marathon site?
Not at check. Marathon sells direct from marathonwatch.com, no discounter was fetched, and the street price recorded for every model equals the list price: $550 Navigator, $575 GPM 34, $675 Officer's Mechanical, $2,000 GSAR. A buyer waiting for a grey-market discount on a Marathon is waiting for something the data has not seen.
What is the difference between the Marathon GPM 34 and the Officer's Mechanical?
The case and the movement. The GPM 34 is 34 mm in composite fibreshell, 41 mm lug-to-lug, 12.5 mm thick, on a Seiko NH35A automatic, rated 30 m, at $575. The Officer's is 36 mm in parkerised steel, 44 mm lug-to-lug, 10.5 mm thick, hand-wound on a Sellita SW210-1, rated 50 m, at $675. Both have 16 mm lugs and tritium tubes.
