Seiko Cal. 3871 - 423

This Hand-Winding model from 1991 features a 38mm Two-Tone case. Powered by the 3871 caliber with 20j jewels beating at 36,000 bph, it delivers a 51 hours power reserve. [seikata-wm-ec8405bfdefd]

Also known as: Helmet, Arnie

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

38mm

Case Thickness

10.1mm

Lug Width

22mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

30m

Dial Color

Black

Jewels

20j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1991

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