Seiko Cal. 6635 - 770

This Spring Drive model from 1974 features a 46mm Stainless Steel case. With its 18mm lug width and 10.8mm profile, it sits comfortably on most wrists. [seikata-wm-2c42531dfc61]

Also known as: Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

46mm

Case Thickness

10.8mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

150m

Dial Color

Burgundy

Jewels

30j

Frequency

28,800 bph

Power Reserve

64 hours

Year

1974

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