Seiko Cal. 6331 - 988

The Seiko 6331-988 represents an important milestone in Seiko's 1966 lineup. Powered by the 6331 caliber with 25j jewels beating at 36,000 bph, it delivers a 65 hours power reserve. [seikata-wm-912ca97cc248]

Also known as: Panda, Arnie

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

12.6mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

120m

Dial Color

Black

Jewels

25j

Frequency

36,000 bph

Power Reserve

65 hours

Year

1966

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