Vintage Seiko Seikomatic-R Diashock - Ref. 8305-0020 - Automatic, 30 Jewels (c. 1965) - Gold Plated A highly collectible vintage Seiko Seikomatic-R, featuring the popular and historically significant Calibre 8305. This model is recognized for its high jewel count and the iconic "Dolphin" engraving on the caseback, signifying its water-resistant capabilities in its era. Heritage & Details Brand: Seiko Model: Seikomatic-R Diashock Reference Number: 8305-0020 Estimated Manufacturing Year: March 1965 (Based on the movement type and the first digits of the serial number: 53****). Movement: Automatic (Self-winding) Calibre: 8305 Jewels: 30 Jewels (a high jewel count for the time, indicating quality finishing) Case Material: Gold Plated / Stainless Steel Back Dial: White/Silver sunburst dial with applied gold baton indices and a gold date window frame. Caseback: Features the desirable engraved Dolphin emblem, a hallmark of Seiko's vintage water-resistant models. Strap: Fitted with a dark, lizard-style leather strap with a gold-toned buckle. Accessories: Comes with the original vintage Seiko box and original warranty/guarantee card (in Japanese), adding significant value for collectors. Condition Operation: The watch was running when checked. Accuracy: Its accuracy is currently unknown and has not been tested to modern standards. Selling Status: This item is being sold "As Is" as a vintage timepiece. Aesthetic Condition: The gold plating shows wear, particularly on the edges and lugs (visible in photos), consistent with its age and use. The dial appears clean. Collector's Note The Seikomatic-R line was an important step for Seiko in the mid-1960s, bridging the gap between their lower and high-end watches. The Calibre 8305, with its 30 jewels, is a testament to the brand's commitment to quality during this period. The presence of the original box and papers, especially combined with the iconic dolphin emblem and known manufacturing year, makes this a particularly attractive and valuable set for a vintage Seiko enthusiast.