Seiko Cal. 6641 - 652

This Spring Drive model from 1966 features a 36mm Titanium case. It features a Black dial protected by a Hardlex crystal and offers 180m of water resistance. [seikata-wm-5e7f0510d86b]

Also known as: Monster, Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

36mm

Case Thickness

9.0mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

180m

Dial Color

Black

Jewels

28j

Frequency

28,800 bph

Power Reserve

37 hours

Year

1966

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