Seiko Cal. 4431 - 231

This Hand-Winding model from 1974 features a 41mm Two-Tone case. It features a Blue Sunburst dial protected by a Mineral crystal and offers 90m of water resistance. [seikata-wm-5c40ac2f67ba]

Also known as: Flighty

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

41mm

Case Thickness

13.6mm

Lug Width

21mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

Blue Sunburst

Jewels

36j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1974

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