Seiko Cal. 6631 - 810

The 6631-810 is a sought-after Automatic piece from Seiko's golden era. With its 21mm lug width and 15.2mm profile, it sits comfortably on most wrists. [seikata-wm-cebc9febf2b1]

Also known as: Silverwave, Sportsmatic

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

43mm

Case Thickness

15.2mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

50m

Dial Color

Black

Jewels

29j

Frequency

36,000 bph

Power Reserve

59 hours

Year

1968

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