Seiko Cal. 6381 - 635

The Seiko 6381-635 represents an important milestone in Seiko's 1973 lineup. With its 20mm lug width and 8.9mm profile, it sits comfortably on most wrists. [seikata-wm-7e05df23a5ae]

Also known as: Sumo

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

43mm

Case Thickness

8.9mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Blue Sunburst

Jewels

32j

Frequency

21,600 bph

Power Reserve

59 hours

Year

1973

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