Seiko Cal. 6637 - 659

The Seiko 6637-659 represents an important milestone in Seiko's 1996 lineup. Powered by the 6637 caliber with 32j jewels beating at 28,800 bph, it delivers a 36 hours power reserve. [seikata-wm-09ea5dd802fe]

Also known as: Tuna, Pogue

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

15.4mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

120m

Dial Color

Silver

Jewels

32j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1996

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