Certina Waterking. Swiss mens wirstwatch from 1965! Serial number : 5539828. This watch accurately working and good keeping time. Date of last service unknown. Original hand winding movement with 17 jewels (cal. 28-10) in very good condtion. This type of mechanism is very durable. Steel original case in very good condition. The watch has very good condition dial, with black hands and black indexes. Original singed crown. Size of watch is 33.5 mm without the crown. Lug to lug is 42.5 mm. Original steel caseback in medium condition. The watch has very good condition black material strap (18 mm) with silver buckle. * All parcels will be sent by Polish Post or another official courier company, I always add a tracking number after shipping and I ship each package as insured. ** Please view the pictures carefully, watches are often used and old, if you have any problem with watch after shiping please first to message me and we will do everything to fix it. Best regards.