Seiko Cal. 6638 - 102

This Hand-Winding model from 1987 features a 37mm Two-Tone case. With its 18mm lug width and 10.4mm profile, it sits comfortably on most wrists. [seikata-wm-ee96b5113dad]

Also known as: Rally, Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

37mm

Case Thickness

10.4mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

Cream

Jewels

23j

Frequency

21,600 bph

Power Reserve

49 hours

Year

1987

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