Seiko Cal. 6631 - 385

The Seiko 6631-385 represents an important milestone in Seiko's 1967 lineup. The Coin-Edge bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-bcf1fe26af5e]

Also known as: Panda, Helmet

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

45mm

Case Thickness

14.0mm

Lug Width

18mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

140m

Dial Color

Cream

Jewels

36j

Frequency

28,800 bph

Power Reserve

63 hours

Year

1967

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