Seiko Cal. 6631 - 264

This Spring Drive model from 1968 features a 37mm Titanium case. With its 20mm lug width and 10.4mm profile, it sits comfortably on most wrists. [seikata-wm-3a790ddd706e]

Also known as: Goldfeather

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

37mm

Case Thickness

10.4mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Silver

Jewels

21j

Frequency

21,600 bph

Power Reserve

42 hours

Year

1968

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