Seiko Cal. 4431 - 812

This Hand-Winding model from 1981 features a 40mm PVD Black case. It features a Burgundy dial protected by a Mineral crystal and offers 160m of water resistance. [seikata-wm-920ddf44f7de]

Also known as: Bullhead, Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

40mm

Case Thickness

10.4mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Burgundy

Jewels

34j

Frequency

21,600 bph

Power Reserve

62 hours

Year

1981

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