Seiko Cal. 0763 - 331

The 0763-331 is a sought-after Quartz piece from Seiko's golden era. Powered by the 0763 caliber with 31j jewels beating at 36,000 bph, it delivers a 43 hours power reserve. [seikata-wm-85a0de4d43fa]

Also known as: Sumo, Golden Tuna

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

38mm

Case Thickness

10.5mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

50m

Dial Color

Cream

Jewels

31j

Frequency

36,000 bph

Power Reserve

43 hours

Year

1968

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