Seiko Cal. 4520 - 940

Seiko 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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