Seiko Cal. 6631 - 643

The 6631-643 is a sought-after Quartz piece from Seiko's golden era. With its 18mm lug width and 14.7mm profile, it sits comfortably on most wrists. [seikata-wm-969aea365dd3]

Also known as: Arnie

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

43mm

Case Thickness

14.7mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

Navy

Jewels

34j

Frequency

21,600 bph

Power Reserve

48 hours

Year

1997

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