Seiko Cal. 4520 - 539

This Hand-Winding model from 1976 features a 41mm Hardlex-Coated Steel case. It features a Green dial protected by a Mineral crystal and offers 180m of water resistance. [seikata-wm-dfa83579a6c5]

Also known as: Golden Tuna

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

9.7mm

Lug Width

21mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

180m

Dial Color

Green

Jewels

35j

Frequency

21,600 bph

Power Reserve

47 hours

Year

1976

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