Seiko Cal. 6637 - 618

The Seiko 6637-618 represents an important milestone in Seiko's 1990 lineup. Powered by the 6637 caliber with 20j jewels beating at 36,000 bph, it delivers a 58 hours power reserve. [seikata-wm-f49dd5fa21e6]

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

13.7mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

60m

Dial Color

Blue Sunburst

Jewels

20j

Frequency

36,000 bph

Power Reserve

58 hours

Year

1990

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