Seiko Cal. 6637 - 381

This Solar model from 1980 features a 46mm Two-Tone case. With its 20mm lug width and 8.2mm profile, it sits comfortably on most wrists. [seikata-wm-54bc933b64c7]

Also known as: Baby Tuna

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

46mm

Case Thickness

8.2mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

Champagne

Jewels

33j

Frequency

36,000 bph

Power Reserve

70 hours

Year

1980

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