Seiko Cal. 6636 - 745

This Spring Drive model from 1966 features a 44mm Hardlex-Coated Steel case. Powered by the 6636 caliber with 29j jewels beating at 21,600 bph, it delivers a 60 hours power reserve. [seikata-wm-84b2cb421dbc]

Also known as: Rally, Flighty

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

11.9mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

White

Jewels

29j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1966

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