Seiko Cal. 6641 - 536

This Spring Drive model from 1974 features a 35mm Stainless Steel case. The Inner Rotating bezel and 35mm case give it a distinctive presence on the wrist. [seikata-wm-cbbae6918398]

Also known as: Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

35mm

Case Thickness

10.9mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Green

Jewels

34j

Frequency

28,800 bph

Power Reserve

49 hours

Year

1974

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