Seiko Cal. 3871 - 642

The Seiko 3871-642 represents an important milestone in Seiko's 1971 lineup. The Rotating bezel and 34mm case give it a distinctive presence on the wrist. [seikata-wm-a2c6d628cf56]

Also known as: Sportsmatic

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

10.2mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

190m

Dial Color

White

Jewels

25j

Frequency

28,800 bph

Power Reserve

58 hours

Year

1971

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