Seiko Cal. 6638 - 101

This Quartz model from 1968 features a 35mm Hardlex-Coated Steel case. Powered by the 6638 caliber with 20j jewels beating at 28,800 bph, it delivers a 51 hours power reserve. [seikata-wm-91a1b830315f]

Also known as: Baby Tuna

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

10.6mm

Lug Width

19mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

160m

Dial Color

Champagne

Jewels

20j

Frequency

28,800 bph

Power Reserve

51 hours

Year

1968

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