Seiko Cal. 6631 - 564

This Hand-Winding model from 1986 features a 37mm Two-Tone case. It features a Cream dial protected by a Sapphire crystal and offers 180m of water resistance. [seikata-wm-e665458ba4f7]

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

37mm

Case Thickness

11.1mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

180m

Dial Color

Cream

Jewels

36j

Frequency

36,000 bph

Power Reserve

66 hours

Year

1986

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