Seiko Cal. 6331 - 463

Released in 1981, the Cal. 6331 with design code 463 was part of Seiko's domestic market collection. Powered by the 6331 caliber with 17j jewels beating at 21,600 bph, it delivers a 40 hours power reserve. [seikata-wm-85f78bcf98fe]

Also known as: Tuna, World Timer

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

38mm

Case Thickness

8.9mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Blue Sunburst

Jewels

17j

Frequency

21,600 bph

Power Reserve

40 hours

Year

1981

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