Seiko Cal. 6631 - 430

The 6631-430 is a sought-after Hand-Winding piece from Seiko's golden era. With its 21mm lug width and 10.8mm profile, it sits comfortably on most wrists. [seikata-wm-a4bab6cc8566]

Also known as: Bellmatic

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

43mm

Case Thickness

10.8mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

120m

Dial Color

Blue Sunburst

Jewels

17j

Frequency

21,600 bph

Power Reserve

44 hours

Year

1965

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