Seiko Cal. 7138 - 231

The Seiko 7138-231 represents an important milestone in Seiko's 1980 lineup. The Inner Rotating bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-3b0ffc3421e7]

Also known as: Sportsmatic, Emperor

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

12.2mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Burgundy

Jewels

33j

Frequency

36,000 bph

Power Reserve

43 hours

Year

1980

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