Seiko Cal. 6638 - 720

The 6638-720 is a sought-after Spring Drive piece from Seiko's golden era. With its 19mm lug width and 14.8mm profile, it sits comfortably on most wrists. [seikata-wm-a06650be2ab8]

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

41mm

Case Thickness

14.8mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Blue Sunburst

Jewels

19j

Frequency

36,000 bph

Power Reserve

72 hours

Year

1980

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