Seiko Cal. 6331 - 665

This Spring Drive model from 1974 features a 40mm Titanium case. Powered by the 6331 caliber with 31j jewels beating at 36,000 bph, it delivers a 65 hours power reserve. [seikata-wm-60bb9492f340]

Also known as: Panda, Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

40mm

Case Thickness

12.0mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

50m

Dial Color

Cream

Jewels

31j

Frequency

36,000 bph

Power Reserve

65 hours

Year

1974

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