Seiko Cal. 6636 - 310

This Spring Drive model from 1966 features a 38mm Two-Tone case. Powered by the 6636 caliber with 27j jewels beating at 28,800 bph, it delivers a 50 hours power reserve. [seikata-wm-1efa69fb27cb]

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

38mm

Case Thickness

13.6mm

Lug Width

19mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

180m

Dial Color

Blue Sunburst

Jewels

27j

Frequency

28,800 bph

Power Reserve

50 hours

Year

1966

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