Seiko Cal. 6331 - 603

The Seiko 6331-603 represents an important milestone in Seiko's 1975 lineup. Powered by the 6331 caliber with 17j jewels beating at 28,800 bph, it delivers a 60 hours power reserve. [seikata-wm-d160e0013f42]

Also known as: Monster

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

34mm

Case Thickness

9.4mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

White

Jewels

17j

Frequency

28,800 bph

Power Reserve

60 hours

Year

1975

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