Seiko Cal. 4521 - 312

The 4521-312 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 4521 caliber with 28j jewels beating at 36,000 bph, it delivers a 53 hours power reserve. [seikata-wm-5c7691606f5c]

Also known as: Tuna, Emperor

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

35mm

Case Thickness

8.5mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

110m

Dial Color

Black

Jewels

28j

Frequency

36,000 bph

Power Reserve

53 hours

Year

1983

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