Marathon SERE US Military wrist compass -- high-quality jeweled bearing 

Marathon SERE Compass Intended Use: SERE (SURVIVAL, EVASION, RESISTANCE, ESCAPE).  Originally designed for pilot escape after a bailout.    Features of the Marathon SERE Compass are the luminous dial and sight line, the Black face featuring luminous markings on all 4 polar positions, and each and every 10-degree interval. Luminous features are provided with non-radioactive MARAGLO paint. Compass is also known as the SERE compass (Survival, Evasion, Resistance and Escape). This wrist compass is water resistant to 30m just like Marathon military wristwatches. The compass case is made of high-impact fiber shell resin and is waterproof and dustproof. Also, this wrist compass can be attached to any of Marathon's general-purpose watches with an 18mm wide band. This wrist compass has the following features: Luminous dial and sight line (painted with MARAGLO) 10-degree graduations Water resistant to 30m Fibershell high impact, waterproof and dustproof case The black face features luminous MARAGLO markings on all 4 polar positions and each and every 10-degree marker This compass is tested to withstand shock, vibration, and water resistance in accordance with specification MIL-PRF-46374G Type II, Class 4 This compass comes with black nylon mil-spec strap with buckle closure that adjusts to most wrist sizes. This strap is manufactured in accordance with MIL-S-46383B, Type II. NOTE: This compass can be used in tandem with the watch and put on the wrist using its own strap. This wrist compass is an important accessory to the wrist watch as it aids in navigation for the airman and allows for ease of use by being mounted on the wrist. (FYI casing is identical in the type of material and size to the general purpose wrist watch and the same type of material as the Navigator watch). Product Specification Brand: Marathon Color: Black This item has a land companion, please click here for the less expensive land alternative: marathon wrist compass