Seiko Cal. 4431 - 270

This Spring Drive model from 1971 features a 44mm Hardlex-Coated Steel case. It features a Cream dial protected by a Sapphire crystal and offers 80m of water resistance. [seikata-wm-2403172c767e]

Also known as: Bullhead

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

12.2mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

80m

Dial Color

Cream

Jewels

21j

Frequency

21,600 bph

Power Reserve

51 hours

Year

1971

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