Seiko Cal. 6631 - 650

The 6631-650 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 6631 caliber with 29j jewels beating at 28,800 bph, it delivers a 45 hours power reserve. [seikata-wm-530f665c26ff]

Also known as: Rally, Bellmatic

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

34mm

Case Thickness

15.4mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

200m

Dial Color

Black

Jewels

29j

Frequency

28,800 bph

Power Reserve

45 hours

Year

1995

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