Seiko Cal. 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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