Seiko Cal. 6631 - 422

The Seiko 6631-422 represents an important milestone in Seiko's 1973 lineup. The Bidirectional bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-10c74a843d41]

Also known as: Panda

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

45mm

Case Thickness

9.6mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

60m

Dial Color

White

Jewels

20j

Frequency

28,800 bph

Power Reserve

71 hours

Year

1973

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