Seiko Cal. 4431 - 755

This Spring Drive model from 1986 features a 43mm Titanium case. Powered by the 4431 caliber with 20j jewels beating at 21,600 bph, it delivers a 37 hours power reserve. [seikata-wm-f7a453990149]

Also known as: Bullhead

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

43mm

Case Thickness

13.7mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

Cream

Jewels

20j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1986

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