Seiko Cal. 6631 - 450

The Seiko 6631-450 represents an important milestone in Seiko's 1966 lineup. It features a Silver dial protected by a Hardlex crystal and offers 50m of water resistance. [seikata-wm-973d9838371d]

Also known as: Sea Horse

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

15.4mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

50m

Dial Color

Silver

Jewels

18j

Frequency

28,800 bph

Power Reserve

62 hours

Year

1966

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