Seiko Cal. 4431 - 231

Released in 1970, the Cal. 4431 with design code 231 was part of Seiko's domestic market collection. The Fixed bezel and 36mm case give it a distinctive presence on the wrist. [seikata-wm-bddd830ee026]

Also known as: Flighty

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

36mm

Case Thickness

11.1mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

50m

Dial Color

Navy

Jewels

25j

Frequency

21,600 bph

Power Reserve

50 hours

Year

1970

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