A watch which is described as “A really robust watch that can take the pressure of 20 atmospheres, 17 Jewels, Shock proof, Stainless Steel case”…
The is the Enicar Sherpa Date, reference 100-116 BaCNS!
This Enicar Sherpa Date is another single crown Super Compressor case watch. A 36 mm in diameter Seapearl case with bayonet case back.
Based on the case back, from 1959.
Even if a Super Compressor case waterproof down to T.W.O-hundred meters, it was not advertised as a divers watch. More like a drivers watch!
Inside is the Calibre AR 1009, a manual movement beating at 18000 vph / 2.5 Hz and a power reserve of 45 hours.
Here is the full advertisement, a page from a Swedish Enicar catalogue.
If you like Enicar, here is a link to more Enicar posts.