Seiko Cal. 6631 - 161

The Seiko 6631-161 represents an important milestone in Seiko's 1991 lineup. It features a Champagne dial protected by a Sapphire crystal and offers 30m of water resistance. [seikata-wm-d9696ef201a9]

Also known as: Emperor

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

11.3mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Champagne

Jewels

28j

Frequency

28,800 bph

Power Reserve

47 hours

Year

1991

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