Seiko Cal. 6637 - 940

This Hand-Winding model from 1988 features a 45mm Hardlex-Coated Steel case. Powered by the 6637 caliber with 23j jewels beating at 28,800 bph, it delivers a 66 hours power reserve. [seikata-wm-631b99f49a8f]

Also known as: Flighty

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

8.4mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Burgundy

Jewels

23j

Frequency

28,800 bph

Power Reserve

66 hours

Year

1988

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