Thank you for viewing. This is an antique from over 50 years ago. It's water-resistant to 200m, but there is no guarantee. It's one of the earliest diver watches, from a time when the technology to finely machine stainless steel didn't exist. It has swing lugs. The bezel is made of aluminum alloy. The inscription on the back cover reads "amfibia." This is a misspelling of the English word "amphibia." Subsequent models corrected this to "amphibia." I purchased it about 3 years ago after it had been overhauled, and I've occasionally wound it since then. Model 350193, Caliber 2209, 18 jewels Thank you.