Seiko Cal. 4520 - 940

The Seiko 4520-940 represents an important milestone in Seiko's 1980 lineup. Powered by the 4520 caliber with 28j jewels beating at 21,600 bph, it delivers a 66 hours power reserve. [seikata-wm-9bdecfb3cee4]

Also known as: Sumo, Tuna

Specifications

Movement

Kinetic

Case Material

Gold-Plated

Case Width

45mm

Case Thickness

13.1mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

110m

Dial Color

Champagne

Jewels

28j

Frequency

21,600 bph

Power Reserve

66 hours

Year

1980

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