Seiko Cal. 4431 - 413

This Hand-Winding model from 1990 features a 38mm Two-Tone case. Powered by the 4431 caliber with 33j jewels beating at 21,600 bph, it delivers a 43 hours power reserve. [seikata-wm-d68905293cac]

Also known as: Helmet, Silverwave

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

38mm

Case Thickness

11.4mm

Lug Width

22mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

100m

Dial Color

Black

Jewels

33j

Frequency

21,600 bph

Power Reserve

43 hours

Year

1990

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