Seiko Cal. 6639 - 221

The Seiko 6639-221 represents an important milestone in Seiko's 1985 lineup. Powered by the 6639 caliber with 17j jewels beating at 36,000 bph, it delivers a 41 hours power reserve. [seikata-wm-cbbbc544f515]

Also known as: Silverwave, Bellmatic

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

44mm

Case Thickness

12.6mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

190m

Dial Color

White

Jewels

17j

Frequency

36,000 bph

Power Reserve

41 hours

Year

1985

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