Seiko Cal. 7138 - 855

Seiko 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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