Seiko Cal. 5643 - 312

The Seiko 5643-312 represents an important milestone in Seiko's 1972 lineup. Powered by the 5643 caliber with 27j jewels beating at 21,600 bph, it delivers a 56 hours power reserve. [seikata-wm-da679f8213d8]

Also known as: Samurai

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

45mm

Case Thickness

9.7mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Blue Sunburst

Jewels

27j

Frequency

21,600 bph

Power Reserve

56 hours

Year

1972

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