Seiko Cal. 6638 - 422

The 6638-422 is a sought-after Spring Drive piece from Seiko's golden era. With its 18mm lug width and 8.9mm profile, it sits comfortably on most wrists. [seikata-wm-8073e7752944]

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

36mm

Case Thickness

8.9mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Blue Sunburst

Jewels

17j

Frequency

36,000 bph

Power Reserve

40 hours

Year

1980

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