Seiko Cal. 6331 - 824

The Seiko 6331-824 represents an important milestone in Seiko's 1971 lineup. Powered by the 6331 caliber with 21j jewels beating at 21,600 bph, it delivers a 37 hours power reserve. [seikata-wm-bdd05fda9c0a]

Also known as: Bellmatic, Navigator

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

44mm

Case Thickness

11.7mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

Champagne

Jewels

21j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1971

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