Seiko Cal. 6631 - 154

The Seiko 6631-154 represents an important milestone in Seiko's 1981 lineup. It features a Burgundy dial protected by a Hardlex crystal and offers 70m of water resistance. [seikata-wm-8e042019e852]

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

12.2mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

70m

Dial Color

Burgundy

Jewels

22j

Frequency

21,600 bph

Power Reserve

66 hours

Year

1981

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