Seiko Cal. 3885 - 637

The Seiko 3885-637 represents an important milestone in Seiko's 1968 lineup. With its 20mm lug width and 10.3mm profile, it sits comfortably on most wrists. [seikata-wm-bffb4b2ade05]

Also known as: UFO

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

41mm

Case Thickness

10.3mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Blue Sunburst

Jewels

19j

Frequency

36,000 bph

Power Reserve

69 hours

Year

1968

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