U.S. Military Pilot/Navigator's Watch by Marathon (MIL-PRF-46374G specification). 42x46 mm. This is current issue watch (manufactured in mid-2004 for a 2003 US Government contract), USAF and USN, Tritium Tracer (Glass Tubes) Navigational Wristwatch that glows 20 times brighter than an ordinary luminous watch. This type of watch is current government issue to elite military, special operations and law enforcement units such as FBI and United States Marshals Service.
The timepiece features a high quality Swiss made high precision jeweled Quartz Movement designed to withstand high G-forces. The watch is water resistant to 6 ATM (196 Ft). It is designed for maintaining accuracy at high altitude to 35,000 FT without compensating pressurization. This is the authentic 1st quality military item and not the commercial, military style "Navy Seals" watch available to the general public marketed by Luminox nor the watches manufactured by MB-Microtec (th Mil-W-46374F copies).
This watch is powered by a NEW 395 watch battery, and is accurate to +/- 21 seconds per month (mine is actually right on after many weeks!). By pulling the crown out, the second hand is stopped (hacked) for synchronization. 12 O'clock illuminated in red. Easy to read at night. Very lightweight and stylish. Watch is manufactured to MIL-46374G specifications. Stainless steel back is stamped as follows: "WATCH, WRIST: NAVIGATORS, MIL-PRF-46374G , 6645-01-364-4042, 26 Millicuries, NRC ID: 54-28526-01E, SP0440-00-D-0168-0011, Nov 2003, Cage: 38776"
The case is is made of an extremely durable black nylon/fiberglass composite material. The rotating outer bezel provides marking for a second time zone. The crystal is an aircraft quality lightweight Lexon material allowing for strength and scratch removal. The dial features the radioactive symbol (Tritium isotope). Tritium is a radioactive isotope of hydrogen. When it decays, it emits beta particles (electrons) that do not penetrate skin, plastic, glass, etc. The electrons excite the coating on the vials, creating a bright green glow. It is a safe (but very expensive) method of illumination, and is used mainly in military watches and gun sights.
This is what the watch looks like at night (12 o'clock tube is orange on these later watches): 
Picture from Desert Storm era showing older version of watch being used:
This is the famous new Type G model with the "sterile dial" that was issued in second half of 2003. Earlier versions (like the Type F) had "Marathon" on dial. This new version has an unmarked dial at the Government's request possibly for security reasons. These watches were found to be slightly more legible (less cluttered) in actual tactical/combat situations. These "clean" dials are now REQUIRED by the latest DoD specs.
Here is a stock photo of the watch:
The copyrighted photo is used with permission of Ned Frederick . Visit his excellent and informative MIL-W-46374 website on US Military Watches: http://home.earthlink.net/%7ebrendo81/46374.html
[此贴子已经被作者于2005-11-16 14:05:46编辑过]
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