Seiko Cal. 6331 - 589

Released in 1965, the Cal. 6331 with design code 589 was part of Seiko's domestic market collection. Powered by the 6331 caliber with 36j jewels beating at 36,000 bph, it delivers a 57 hours power reserve. [seikata-wm-5c6c4bfdb40b]

Also known as: UFO

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

37mm

Case Thickness

9.7mm

Lug Width

18mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

190m

Dial Color

Black

Jewels

36j

Frequency

36,000 bph

Power Reserve

57 hours

Year

1965

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