Seiko Cal. 6638 - 279

This Spring Drive model from 1966 features a 35mm Gold-Plated case. Powered by the 6638 caliber with 36j jewels beating at 21,600 bph, it delivers a 53 hours power reserve. [seikata-wm-fec16dcdb5c0]

Also known as: Turtle, Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

35mm

Case Thickness

13.8mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

150m

Dial Color

Navy

Jewels

36j

Frequency

21,600 bph

Power Reserve

53 hours

Year

1966

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