Seiko Cal. 4431 - 557

This Hand-Winding model from 1997 features a 40mm Gold-Plated case. It features a Green dial protected by a Sapphire crystal and offers 70m of water resistance. [seikata-wm-10dcb63afc86]

Also known as: UFO

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

40mm

Case Thickness

15.7mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

70m

Dial Color

Green

Jewels

18j

Frequency

21,600 bph

Power Reserve

71 hours

Year

1997

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