Seiko Cal. 7138 - 637

The 7138-637 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 7138 caliber with 25j jewels beating at 36,000 bph, it delivers a 46 hours power reserve. [seikata-wm-04d2409f9f44]

Also known as: Shogun, Arnie

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

34mm

Case Thickness

12.7mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

50m

Dial Color

Silver

Jewels

25j

Frequency

36,000 bph

Power Reserve

46 hours

Year

1990

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