Seiko Cal. 7085 - 631

The 7085-631 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 7085 caliber with 30j jewels beating at 28,800 bph, it delivers a 65 hours power reserve. [seikata-wm-c69ea9142a80]

Also known as: Sumo, Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

11.1mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

90m

Dial Color

White

Jewels

30j

Frequency

28,800 bph

Power Reserve

65 hours

Year

1966

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