The re-engineered 41mm SSNAV-D is built for rugged adventures. Featuring enhanced lug tapering for comfortable all-day wear and a screw-down crown for 10ATM water resistance, the SSNAV-D is an advanced upgrade of a true classic. Tap to shop the watch. #MarathonWatch #BestInTheLongRun #SSNAV #ToolWatch #PilotsWatch