Seiko Cal. 6331 - 988

The Seiko 6331-988 represents an important milestone in Seiko's 1977 lineup. Powered by the 6331 caliber with 35j jewels beating at 28,800 bph, it delivers a 55 hours power reserve. [seikata-wm-5ee9bd291135]

Also known as: World Timer

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

12.4mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

40m

Dial Color

Blue Sunburst

Jewels

35j

Frequency

28,800 bph

Power Reserve

55 hours

Year

1977

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