Seiko Cal. 3881 - 639

The Seiko 3881-639 represents an important milestone in Seiko's 1974 lineup. The Inner Rotating bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-c15e2501ddd7]

Also known as: Sportsmatic, Emperor

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

11.7mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Black

Jewels

17j

Frequency

21,600 bph

Power Reserve

68 hours

Year

1974

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