Established in 1939, MARATHON supplies commercial, government and military clients around the world.

MARATHON's Swiss manufacturing plant give the company full control of production, export and distribution of its highest quality timing instruments.

MARATHON Watch is currently 'ONLY' manufacturer supplying to U.S. Military.

Following link requires PDF to open:

U.S. Military Specification - each watch must pass all specification.

U.S. Qualified Product List -as you can see only Marathon supplies U.S. Government

• ETA High-Torque Swiss Quartz 
• Case diameter 46.6mm (excluding crown )
• 43.0mm (including crown guard but excluding crown)
• Stainless Steel Case 316L grade
• Screw down crown
• 30 ATM Water Resistant (300 m depth)
• Sapphire Crystal 3mm thickness
• Screw Back
• Date
• Uni-directional turnig bezel 120 clicks
• Non-Tritium Superluminova C3 Luminous (MaraGlo technology) 
• Weight: 159.6g (5.2oz) 

'LPG' stands for Le Grande Plongeur, it means 'The Big Plunger' in French.  And you can see why from the spec. above and pitures.

Non-Tritium Superluminova C3 Luminous (MaraGlo technology) is used thru out, triangle on turning bezel, dots on inner chapter ring (5 minutes increment), minutes, hour and second hands.

Water resistance rated to 300m / 1000ft depth.  Case is cut from 316L grade solid stainless steel.  Equipped with screw down crown with anti-slip engraving on the surface so one can operate with gloved hand.

Includes genuine rubber strap 22mm width, and box.

Comes with 1 year warranty.

This is a very big watch!  Please consider it's size before purchasing.  Great diving instrument.  Our Size Comparioson against PANERAI 44mm Case.
If you are considering MARATAC ZULU Straps, BZ-4 will not accomodate this watch due to it's size.  Please use Standard 2-ring MARATAC ZULU Straps.

Option to consider: JSAR Dive Bracelet