Marathon SSNAV-D Steel Navigator with Date - 41mm - No Government Markings Defstan Nylon WW194013SS-0103

The new 41mm Steel Navigator w/ Date (SSNAV-D) has received many engineering improvements when compared to the design of its predecessor. One of the biggest updates is in the form of the new quartz movement: the 3 Jewel ETA F06.412 with HeavyDrive-PreciDrive. Now the most precise watch in the Marathon electric watch lineup, the Steel Navigator w/ Date features an accuracy of ± 10s/year, operating at 32’768 Hz. This is made possible by the combination of ETA’s venerable quartz technology, as well as customizations specifically for Marathon. With a deviation of -/+ 10 seconds per year, ETA’s Precidrive technology makes it one of the most accurate quartz movements on the market, 10 times more precise than standard movements.