Zenith Diver A3634 P3632 Mens Automatic 38.5mm Wristwatch Vintage Swiss. The watch is in running condition and keeping time. The Ervin Piquerez S.A. (EPSA) case is in good condition with signs of wear appropriate of a vintage timepiece. The dial is original and untouched. The 2 tone faded blue look of this Vintage Zenith is simply beautiful and will be a perfect addition to a vintage watch collection.