Seiko Cal. 6631 - 826

The Seiko 6631-826 represents an important milestone in Seiko's 1971 lineup. Powered by the 6631 caliber with 24j jewels beating at 36,000 bph, it delivers a 72 hours power reserve. [seikata-wm-c4942310d44e]

Also known as: Navigator, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

40mm

Case Thickness

10.6mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

150m

Dial Color

Burgundy

Jewels

24j

Frequency

36,000 bph

Power Reserve

72 hours

Year

1971

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