Seiko Cal. 6331 - 118

This Spring Drive model from 1968 features a 44mm Hardlex-Coated Steel case. Powered by the 6331 caliber with 26j jewels beating at 21,600 bph, it delivers a 65 hours power reserve. [seikata-wm-078b32df878c]

Also known as: Baby Tuna, Flighty

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

12.7mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

110m

Dial Color

Navy

Jewels

26j

Frequency

21,600 bph

Power Reserve

65 hours

Year

1968

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