Here is a Valjoux 7733 manual winding CROTON CHRONOGRAPH measuring 38.5mm. X 46mm. Lug to lug… 14mm. Thick LARGE! Notice the original black dial with red accent at 12:00, baton hands, red sweep seconds, silver sub registers (measuring 30 minutes and constant seconds) along with tachymetere scale. The large stainless steel screw-back case is sparkling with polished pushers. The VALJOUX 7733 manual winding movement was just cleaned and is keeping time quite well. A fine and large 1960’s vintage chronograph.