Seiko Cal. 0764 - 990

The Seiko 0764-990 represents an important milestone in Seiko's 1996 lineup. With its 20mm lug width and 9.3mm profile, it sits comfortably on most wrists. [seikata-wm-c32b77bf74e7]

Also known as: Sumo, Helmet

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

36mm

Case Thickness

9.3mm

Lug Width

20mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

80m

Dial Color

Champagne

Jewels

27j

Frequency

21,600 bph

Power Reserve

71 hours

Year

1996

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