Seiko Cal. 5637 - 387

This Spring Drive model from 1993 features a 40mm PVD Black case. The Rotating bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-0bacc6f4bc41]

Also known as: UFO, Flighty

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

40mm

Case Thickness

14.9mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

190m

Dial Color

Navy

Jewels

28j

Frequency

21,600 bph

Power Reserve

65 hours

Year

1993

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