Seiko Cal. 6637 - 186

This Hand-Winding model from 1999 features a 41mm Gold-Plated case. Powered by the 6637 caliber with 25j jewels beating at 21,600 bph, it delivers a 60 hours power reserve. [seikata-wm-17d938af6072]

Also known as: Bullhead

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

41mm

Case Thickness

8.0mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

170m

Dial Color

White

Jewels

25j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1999

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