Seiko Cal. 7137 - 640

The Seiko 7137-640 represents an important milestone in Seiko's 1977 lineup. With its 18mm lug width and 9.5mm profile, it sits comfortably on most wrists. [seikata-wm-054664bc6521]

Also known as: Shogun, Golden Tuna

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

39mm

Case Thickness

9.5mm

Lug Width

18mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

90m

Dial Color

Cream

Jewels

30j

Frequency

21,600 bph

Power Reserve

45 hours

Year

1977

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