Seiko Cal. 6331 - 298

The Seiko 6331-298 represents an important milestone in Seiko's 1965 lineup. Powered by the 6331 caliber with 29j jewels beating at 21,600 bph, it delivers a 44 hours power reserve. [seikata-wm-20e77f71f1bf]

Also known as: Helmet

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

37mm

Case Thickness

11.4mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

200m

Dial Color

Green

Jewels

29j

Frequency

21,600 bph

Power Reserve

44 hours

Year

1965

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