LonginesSkin Diver 7981-3 30CH Big eye 1960s chronograph. This was one of the raremulti purpose chronograph for driving (tachy scale on the dial), diving and aviators (turning bezel for a second time zone). Untouched stainless steel watch case with screwback measures 40mm. The outer back case has an interesting engraving as pictured. Matte original black tritium dial, with white subdials, silver baton hands. Powered by the famous Longines Cal. 30CH manual windingmovement. Condition on this piece is mint every functions work properly, fitted by the original s/s bracelet.