Seiko Cal. 6631 - 698

The Seiko 6631-698 represents an important milestone in Seiko's 1979 lineup. Powered by the 6631 caliber with 27j jewels beating at 36,000 bph, it delivers a 59 hours power reserve. [seikata-wm-2119e29d1a3e]

Also known as: Panda, Bullhead

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

36mm

Case Thickness

15.3mm

Lug Width

19mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

150m

Dial Color

Burgundy

Jewels

27j

Frequency

36,000 bph

Power Reserve

59 hours

Year

1979

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