Seiko Cal. 6636 - 231

The Seiko 6636-231 represents an important milestone in Seiko's 1973 lineup. It features a Blue Sunburst dial protected by a Sapphire crystal and offers 50m of water resistance. [seikata-wm-ba70c4ea3881]

Also known as: Goldfeather, World Timer

Specifications

Movement

Kinetic

Case Material

Gold-Plated

Case Width

34mm

Case Thickness

9.6mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

50m

Dial Color

Blue Sunburst

Jewels

23j

Frequency

21,600 bph

Power Reserve

41 hours

Year

1973

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