This is an early, somewhat mysterious compressor cased, waterproof to 12 atmospheres, sports watch. We have successfully waterproofed it to 3 ATM which is the standard test some vintage watches pass. Mysterious because the name on the dial appears to be an independent importer of Swiss watches having made an order for his local market. It is therefore rare, and rare also because it is in such good shape. The logo on the crown can point to the manufacturer named ONSA. The dial and hands points to a date around 1960, which is confirmed by the inside back cover being stamped 5-62. The watch has a very nice detailed dial with elaborate hour markers, nice hands and intact lume. The compact stainless steel case is 36 mm in diameter, with a long (44,4 mm) stretch from lug tip to lug tip and a thickness of 11,3 mm. Internally it is driven by a good quality automatic ETA 2454 movement that has been fully serviced. The cyclop over the date window means in our opinion that the crystal is the original one. In short an intriguing vintage that will serve as a conversation piece with watch interested friends!