The Nivada Grenchen F77 is a Swiss Made reissue of a 1977 classic watch. It features a 37mm stainless steel case with a blue, antracite or brown smoked dial and baton indexes. The watch is powered by a Swiss made SOPROD P024 automatic movement with a power reserve of 38 hours. It is available with an integrated stainless steel bracelet or a black canvas strap with Velcro closure. The F77 is water resistant to 100 meters. Nivada Grenchen F77 No Date Details:SOPROD calibre PO24 automatic movement25 jewels38 hour power reserveblack dial with applied index markersSuperLuminova on hands and markers316L stainless steel casescrew down crownscrew in casebackdouble domed sapphire crystal with anti-reflective coatingwater resistant to 100 metrescase diameter: 37mmcase thickness: 12.65mmlug width: 20mm