型號/Model.......................Gyro Marvel
機芯/Movement................Automatic 290 movement
石數/# of jewels.................17J
生產年份/Production date ..1958
口徑/Diameter..................35mm
入手難易度/Rarity ............★★★★☆
備註/Remarks
The first Seiko automatic watch. Due to back-case of G Marvel look very like the bubble-back Rolex, it also called “Bubble-back Seiko”. This kind of back-case has been used till 1965
