Seiko Cal. 7138 - 392

Seiko 7138-392

The Seiko 7138-392 represents an important milestone in Seiko's 1971 lineup. Powered by the 7138 caliber with 36j jewels beating at 21,600 bph, it delivers a 48 hours power reserve. [seikata-wm-75bc87fcee36]

Also known as: Sumo, Shogun

Specifications

Movement
Automatic
Case Material
Two-Tone
Case Width
41mm
Case Thickness
11.9mm
Lug Width
18mm
Crystal
Mineral
Bezel
Bidirectional
Water Resistance
190m
Dial Color
Blue Sunburst
Jewels
36j
Frequency
21,600 bph
Power Reserve
48 hours
Year
1971

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