Seiko Cal. 6321 - 257

The Seiko 6321-257 represents an important milestone in Seiko's 1973 lineup. Powered by the 6321 caliber with 18j jewels beating at 28,800 bph, it delivers a 42 hours power reserve. [seikata-wm-01cb5cae8941]

Also known as: Samurai, Sumo

Specifications

Movement

Kinetic

Case Material

Gold-Plated

Case Width

43mm

Case Thickness

11.1mm

Lug Width

20mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

200m

Dial Color

Black

Jewels

18j

Frequency

28,800 bph

Power Reserve

42 hours

Year

1973

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