This was serviced in 2023.New crystal, original band. 3 register chronograph with day and date. Swiss mvmt. Black PVD, Stainless Steel. This was issued by the US Army for artillery gunners in the early 1980's. 
Lug to lug:44.8mm  Width:41.6mm  There are no extra links for the bracelet. Unless you have a smaller wrist size you will most likely need a new bracelet.
From Wikipedia, the free encyclopedia
Gallet
 
Company type
Privately held company
Industry
Clock & watch movement, case manufacturing
Founded
Gallet in 1466 (558 years ago) by Humbertus Gallet in Geneva
Gallet & Cie in 1826 (198 years ago) by Julien Gallet in La Chaux-de-Fonds
Headquarters
Switzerland
Products
Clocks, wristwatches, stopwatches, industrial timers for professional application
Website
galletwatch.com
Gallet (ˈgæl.eɪ) is a historic Swiss manufacturer of high-end timepieces for professional, military, sports, racing, and aviation use. Gallet is the world's oldest clock making house with history dating back to Humbertus Gallet, a clock maker who became a citizen of Geneva in 1466.[1][2] The Gallet & Cie (Gallet & Company) name was officially registered by Julien Gallet (1806–1849) in 1826,[3] who moved the family business from Geneva to La Chaux-de-Fonds, Switzerland. Prior to this date, operations commenced under the name of each of the Gallet family patriarchs.
Gallet is best known during the 20th century to the present day for its line of MultiChron chronograph wristwatches. Produced primarily for military, industrial, auto racing, and other professional applications,[4] Gallet's MultiChron watches often incorporated a number of advanced timekeeping innovations.[5][6]
A Gallet timepiece of particular renown was the Flight Officer time zone chronograph. Commissioned by Senator Harry S. Truman in 1939[7] for pilots of the United States Army Air Forces, the Flight Officer (a.k.a. Flying Officer) had a rotating 12-hour bezel and the names of 23 major world cities printed on the periphery of the dial (face). These features made it possible to calculate changes in the time as an aviator flew across lines of longitude. Besides being the first time zone calculating wristwatch based upon a 12-hour system (24 hour world time wristwatches were produced by Patek Philippe in 1937),[8] the Flight Officer was the first wristwatch with a rotating bezel and one of the world's first wrist chronographs to be housed in a water-resistant case.[5] Truman wore a Gallet Flight Officer during his terms as 33rd president (1945–1953).
The modern Gallet Company is one of a small handful of independent Swiss watch brands that still maintain in-house manufacturing facilities. While recently expanding the company's marketing focus to reach a wider audience of "civilian" consumers for its upscale professional-use timepieces, Gallet continues to privately produce components and modules for a number of other entities within the luxury-class timekeeping industry.
1983: Excelsior Park closes its factory on 6 April[25] due to the lack of family successors and a sizable decrease in orders of mechanical movements from its Gallet partner during the difficult "quartz crisis". To continue to support owners of Excelsior Park powered watches, Gallet acquires the balance of the company's remaining inventory and assets. An attempt in 1984 by the Flume Company of Germany to revitalize Excelsior Park name proves unsuccessful.
1984: Wein Brothers, a Canadian distributor of timing instruments, contracts with the Gallet Company to manufacture rugged wristwatches for distribution to the US Government.[26] To facilitate the initial transactions, the watch dials (faces) of these military specification watches are marked Marathon, a previously held Gallet trademark.[27] Wein Brothers continues to distribute military timepieces and related products under the Marathon brand to the present day.
1990: Gallet supplies 30,000 "Marathon Navigator" wristwatches to the U.S. military for Operation Desert Storm.[28] Prior to the fulfillment of the contract, prototypes are arduously tested by the US Government to withstand the most adverse of circumstances. All examples exceed the military's strict requirements for sustaining accuracy and functionality during combat conditions.