Seiko Cal. 6637 - 907

The Seiko 6637-907 represents an important milestone in Seiko's 1999 lineup. Powered by the 6637 caliber with 19j jewels beating at 36,000 bph, it delivers a 72 hours power reserve. [seikata-wm-4576591d2c30]

Also known as: Bellmatic

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

13.5mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

30m

Dial Color

Burgundy

Jewels

19j

Frequency

36,000 bph

Power Reserve

72 hours

Year

1999

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