Seiko Cal. 4431 - 956

This Spring Drive model from 1992 features a 36mm Titanium case. The Bidirectional bezel and 36mm case give it a distinctive presence on the wrist. [seikata-wm-5084cd0db7e6]

Also known as: UFO, Bellmatic

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

36mm

Case Thickness

15.2mm

Lug Width

19mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

30m

Dial Color

White

Jewels

33j

Frequency

36,000 bph

Power Reserve

47 hours

Year

1992

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