Seiko Cal. 4521 - 331

The 4521-331 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 4521 caliber with 28j jewels beating at 21,600 bph, it delivers a 45 hours power reserve. [seikata-wm-5745f307c21e]

Also known as: Emperor

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

10.8mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

100m

Dial Color

Green

Jewels

28j

Frequency

21,600 bph

Power Reserve

45 hours

Year

1993

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