Seiko Cal. 7139 - 957

Seiko 7139-957

The 7139-957 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 7139 caliber with 19j jewels beating at 28,800 bph, it delivers a 62 hours power reserve. [seikata-wm-e148a7246ece]

Also known as: Sumo, Shogun

Specifications

Movement
Spring Drive
Case Material
Gold-Plated
Case Width
44mm
Case Thickness
10.5mm
Lug Width
21mm
Crystal
Sapphire
Bezel
Rotating
Water Resistance
120m
Dial Color
Blue Sunburst
Jewels
19j
Frequency
28,800 bph
Power Reserve
62 hours
Year
1987

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seikata-wm-e148a7246ece