Seiko Cal. 6639 - 621

The 6639-621 is a sought-after Hand-Winding piece from Seiko's golden era. With its 21mm lug width and 10.0mm profile, it sits comfortably on most wrists. [seikata-wm-fe8dfcf6e2f1]

Also known as: Samurai

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

40mm

Case Thickness

10.0mm

Lug Width

21mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

190m

Dial Color

Navy

Jewels

22j

Frequency

28,800 bph

Power Reserve

43 hours

Year

1974

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