this is a very rare 18k yellowgold iwc from the early 1970s with tuning fork caliber 130, the technic that was used for only a short period before quartz came out. the second hand of a tuning fork watch runs in a comparable constant way as one from a manually powered movement. a typical silent humming sound can be realized, when you listen closely on the movement. this iwc feautures an unpolished 37x 41mm 18k yellowgold-case and it´s movement has just received a service in 2019. dial and hands are flawless and all parts about the watch are the original ones. the piece with important historic technic and beautiful wrist appearance comes on a black vintage sportropicband and golden iwc buckle.