Seiko Cal. 6631 - 439

The 6631-439 is a sought-after Spring Drive piece from Seiko's golden era. The Rotating bezel and 35mm case give it a distinctive presence on the wrist. [seikata-wm-4de36cbeb712]

Also known as: Goldfeather

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

13.8mm

Lug Width

22mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

80m

Dial Color

Black

Jewels

28j

Frequency

36,000 bph

Power Reserve

56 hours

Year

1985

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