Here is an example of a f300hz Omega Seamaster chronometer-grade vintage watch made by Omega in the early 1970s. The robust and massive 41.2mm (13.2mm thick with sapphire crystal) stainless steel case is in fabulous shape. The original dial is pristine, retaining the original hands and raised red Omega logo. The original crown also sets with a quick-set day/date feature. The stainless steel screw back seals in the electronic Omega f300 movement that keeps extremely accurate time. The original full-sized Omega bracelet is in great shape.