Seiko Cal. 4531 - 610

This Spring Drive model from 1972 features a 41mm Two-Tone case. The Bidirectional bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-721bca5a9154]

Also known as: Sportsmatic, Flighty

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

41mm

Case Thickness

12.2mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

70m

Dial Color

Champagne

Jewels

31j

Frequency

28,800 bph

Power Reserve

60 hours

Year

1972

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