Seiko Cal. 6381 - 525

This Spring Drive model from 1977 features a 39mm Stainless Steel case. With its 18mm lug width and 14.3mm profile, it sits comfortably on most wrists. [seikata-wm-70e4a5b0e186]

Also known as: Sumo, Crown

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

39mm

Case Thickness

14.3mm

Lug Width

18mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

80m

Dial Color

Burgundy

Jewels

32j

Frequency

21,600 bph

Power Reserve

71 hours

Year

1977

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