Seiko Cal. 6331 - 192

The Seiko 6331-192 represents an important milestone in Seiko's 1972 lineup. Powered by the 6331 caliber with 20j jewels beating at 28,800 bph, it delivers a 55 hours power reserve. [seikata-wm-6e85c622a6b5]

Also known as: Sumo, Helmet

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

45mm

Case Thickness

10.1mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

120m

Dial Color

Silver

Jewels

20j

Frequency

28,800 bph

Power Reserve

55 hours

Year

1972

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