Certina is a famous Swiss brand is owned by the Swatch group. The overall mint watch. The oval case jumbo size design is from dated 1968-1969's. It has a famous Turtle Back Case and Certina In house Cal 25 652 Automatic movement. -Certina automatic DS-2 Day-Date Turtle Back (Has improved DS System or approved “DS” system, in which the whole movement assembly is float-mounted in the case by means of an elastic anti-shock ring made of synthetic rubber. This version also has the well-known corrugated case back with the turtle logo on it.) -Swiss made Certina 28 Jewels Cal 25 652 -In-house Movement Automatic Sweep second Day and Date 11.5''' Dm= 25.60mm H= 5.98mm 27/28 jewels 19'800 A/h Power reserve 42h Datasheet 1,2 Date without quickset Set by changing 23-24h Derivated from caliber 25-651 1960-1977 -Crown is the original Certina. -Buckle Original Certina -Back case 5906 300-M signed Certina. -Diameter case: 39 mm without crown. x 43 mm approx. Pretty big for the late 60's. -NOS genuine leather strap with Certina buckle, total length is 23.3 cm. -The day-date indication at 3 o clock and works fine. The watch in all original condition and showing normal use considering its age and has 20 micron gold plated casing (See photos). The glass is 9/10 and scratch-free condition. -Working: The watch is serviced and in working condition. Since it is the vintage watch we do not give a guarantee in terms of accuracy, durability and reserve power. We take a video of the watch working order. Please see 34 photos for the best evaluation and consider yourself for additional information. Photos are the main part of the description. -The watch comes with generic or other brands watch box as a gift for additional protection. -We pack well and ship it tracked and insured via express couriers. -Please study the import duties and customs regulations of your country. All kind of customs duty to be paid is buyers responsibility. -Do not forget to check out our other auctions, please.