The automatic calendar trumps with a helmet case, just like the manufacturer built it in the 1970s. The case with deeply drawn lugs has a round cut, brushed sides and a polished bezel. The workmanship is very good, a water resistance of 50 meters is achieved. The crown is recessed, but can be easily pulled through a circumferential groove to set the time and date. The double anti-reflective sapphire crystal is now a matter of rolex replica gmt master ii 116718gso 40mm green dial course in Constantin Weisz watches. The bottom has a mineral glass.