CERTINA DS rare gents diving watch in steel, Switzerland around 1965, two piece construction case reference 5801-113, turning bezel with 60-minutes-graduation, screwed down 'turtle-back'-case back, black crosshairs- dial, Arabic numerals & luminous indexes, silvered luminous-hands, date at 3, rhodium plated movement calibre 25-651, 27 jewels, precision adjustment, modern Certina DS box enclosed, diameter approx. 39 mm, condition 2