Seiko Cal. 6638 - 103

The 6638-103 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6638 caliber with 27j jewels beating at 21,600 bph, it delivers a 70 hours power reserve. [seikata-wm-8dcafe3349e6]

Also known as: Turtle, Bullhead

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

39mm

Case Thickness

9.0mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

60m

Dial Color

Silver

Jewels

27j

Frequency

21,600 bph

Power Reserve

70 hours

Year

1992

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