Seiko Cal. 6645 - 564

This Spring Drive model from 1966 features a 37mm Titanium case. Powered by the 6645 caliber with 22j jewels beating at 36,000 bph, it delivers a 43 hours power reserve. [seikata-wm-d3b75991e490]

Also known as: Panda, Helmet

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

37mm

Case Thickness

9.8mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

160m

Dial Color

Green

Jewels

22j

Frequency

36,000 bph

Power Reserve

43 hours

Year

1966

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