Grand Seiko Historical Collection Self-Dater Quartz Limited Edition SBGV011
In 1964, the 2nd generation of Grand Seiko was released. Manfactured at Suwa Seikosha (now Seiko Epson), the Grand Seiko Self-Dater was the 1st model of Grand Seiko not only to use a date display, but also water resistance and to use the Zaratsu polishing technique. For the 50th Anniversary of this model, Seiko has introduced 3 Spring Drive models, and 2 quartz models to commemorate this piece as a part of their Historical Collection. Also made at their Suwa facility, Shinshu Watch Studio, these limited editions feature higher accuracry calibers, the 9R15 for Spring Drive rating at +/- 10 seconds a month, and the Quartz 9F82 with +/- 5 seconds a year, both utilizing specially selected quartz crystals to ensure higher accuracy. These pieces symbolize the "Evolution of Practicality".
Drive system Quartz Caliber No. 9F82 Case Stainless case Case back Screw case back Glass Sapphire crystal with anti-reflective coating Bracelet Crocodile Leather Buckle Stainless steel with three-fold clasp with push button release Accuracy ±5 seconds/ year Water resistance 10 bar Magnetic resistance 4800 A/m (60 gauss) Thickness 10.5 mm Size of case 37.2mm