Seiko Cal. 4521 - 343

The Seiko 4521-343 represents an important milestone in Seiko's 1971 lineup. Powered by the 4521 caliber with 28j jewels beating at 21,600 bph, it delivers a 45 hours power reserve. [seikata-wm-0080b1bb4638]

Also known as: Rally, Bellmatic

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

35mm

Case Thickness

9.8mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

50m

Dial Color

Cream

Jewels

28j

Frequency

21,600 bph

Power Reserve

45 hours

Year

1971

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