Seiko Cal. 7138 - 855

The 7138-855 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 7138 caliber with 22j jewels beating at 36,000 bph, it delivers a 65 hours power reserve. [seikata-wm-bddd3b8d60c7]

Also known as: Sumo, Shogun

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

40mm

Case Thickness

13.4mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

60m

Dial Color

Cream

Jewels

22j

Frequency

36,000 bph

Power Reserve

65 hours

Year

1978

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