Seiko Cal. 6637 - 508

The Seiko 6637-508 represents an important milestone in Seiko's 1985 lineup. Powered by the 6637 caliber with 28j jewels beating at 36,000 bph, it delivers a 47 hours power reserve. [seikata-wm-d5b5e2057d5d]

Also known as: UFO, Goldfeather

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

38mm

Case Thickness

11.4mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Silver

Jewels

28j

Frequency

36,000 bph

Power Reserve

47 hours

Year

1985

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