Seiko Cal. 6321 - 363

The Seiko 6321-363 represents an important milestone in Seiko's 1987 lineup. Powered by the 6321 caliber with 26j jewels beating at 28,800 bph, it delivers a 66 hours power reserve. [seikata-wm-0f70b09deb70]

Also known as: UFO, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

38mm

Case Thickness

9.7mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

130m

Dial Color

Black

Jewels

26j

Frequency

28,800 bph

Power Reserve

66 hours

Year

1987

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