Marathon Pilot's Navigator with Date | Sapphire Crystal Marking:US Government white and red replicate an

white and red replicate an internationally recognised breathing exercise in freediving: A breath is taken during the five-second blue phase

as well as outdoor enthusiasts

This timepiece is a tribute to the early times of professional diving watches with many historical references: the egg-shaped 10 ATM water resistant case

Domed screw down crown at 4 o’clock with triple seals

Marathon Pilot's Navigator with Date | Sapphire Crystal Marking:US Government white and red replicate anThe Marathon Pilot's Navigator Sapphire Crystal is a highly accurate watch built to strict military specifications under MIL PRF 46374G. Designed for pilots, parachutists, and law enforcement, the Military Navigator Pilot's Quartz is made to withstand the many challenges that are faced in a professional or everyday environment. First developed by Marathon Watch Company in 1986, the Marathon Pilot's Navigator Sapphire Crystal was made as a request by