Seiko Cal. 6637 - 235

This Spring Drive model from 1985 features a 37mm Two-Tone case. Powered by the 6637 caliber with 30j jewels beating at 21,600 bph, it delivers a 45 hours power reserve. [seikata-wm-94c3c0f5cac8]

Also known as: Goldfeather, Emperor

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

37mm

Case Thickness

13.8mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

150m

Dial Color

Silver

Jewels

30j

Frequency

21,600 bph

Power Reserve

45 hours

Year

1985

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