Its one-piece "monocoque" case was revolutionary for its time, and continues to be used today in a shape which has barely changed since then. The ingenious design, the innovative monocoque case, ensured the watch was both water-resistant and air-tight. A simple and balanced overall design allow this watch to be worn with just about anything. It is a collectible watch. Ocean Star - Powerwind - Automatic, late 1960s Ref: 2888424 Mido 1147OC, 19.800 A/h, 17 Jewels, Ball-bearing rotor, Incabloc , Reed's regulator Power reserve: 44h Double G 40 microns gold plated patented Ocean*Star "waterproof" case opens through the crystal. Clean factory original Mido domed acrylic crystal. Dial looks great. Crown original signed Mido. Date: set by changing 20-24h Case 33,5 mm (without crown) Case thickness: 10 mm Lug width: 18 mm Lug to lug: 35 mm Leather strap 21 cm. Professionally serviced and the watch is in very good condition. The quick date setting function works without any problems. It is running approximately +15 seconds per day (results of 48 hours of use in my environment). No original box and papers. Comes with a simple carrying case. We cannot guarantee waterproofness. Shipped via UPS, DHL with tracking code. Customs duties are the buyer's responsibility and beyond the control of sellers. Return cost will be buyer's responsibility. Due to difficulties in importing watches to Turkey, returns are only accepted via international postal services in the recipient's country.