Seiko Cal. 6331 - 421

The Seiko 6331-421 represents an important milestone in Seiko's 1986 lineup. Powered by the 6331 caliber with 24j jewels beating at 36,000 bph, it delivers a 54 hours power reserve. [seikata-wm-7596f822ae0c]

Also known as: Helmet, Rally

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

42mm

Case Thickness

14.8mm

Lug Width

20mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

200m

Dial Color

Burgundy

Jewels

24j

Frequency

36,000 bph

Power Reserve

54 hours

Year

1986

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