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The Marathon General Purpose Quartz with Data (GPQ) and Tritium is a highly accurate watch built to strict military standards (MIL-PRF-46374G, Type I, Class 1). Designed for field use by military personnel, the General Purpose Quartz is built to withstand the needs of infantry, as well as suit civilians needs for a casual watch.
The GPQ is made from a highly durable, impact resistant fibershell case that is water resistant to 3 atmospheres (30 meters - 100 feet), sweat resistant and will not yield to the elements. The fibershell case of the GPQ also has a passive matte finish. This matte finish aids in protecting infantry positions as this finish does not provide a reflective surface which would occur on a normal metal case. Fibershell is also an extremely lightweight material, an important factor on the battlefield where every ounce counts.
The GPQ uses a sapphire crystal which is durable and scratch resistant. The back of the GPQ is made of 316L surgical stainless steel, a steel with low carbon content that will not corrode over time.
The GPQ is made in La Chaux de Fonds, Switzerland, to guarantee the highest level of quality and accuracy in manufacturing. Powered by a Swiss made, high torque, 3 jewel ETA F06 Quartz movement, the GPQ guarantees you a high degree of accuracy in timekeeping. The ETA F06 is accurate to -0.3/+0.5 seconds per day and also includes an End of Life (EOL) indicator. The EOL indicator will advance the seconds hand once every 4 seconds to inform you that a battery change is needed.
The GPQ uses self contained Tritium gas tubes to ensure constant visibility in low light situations. A gas tube is placed on each hour marker and hand. Tritium tubes are self illuminating gas tubes which contain an isotope of hydrogen, meaning they will not dull down in brightness like normal photo luminescent paint which requires an external light source to create a glow.
The General Purpose Quartz combines military durability with Swiss craftsmanship to provide an accurate timepiece that will satisfy you for years of daily use.