Seiko Cal. 4521 - 523

The Seiko 4521-523 represents an important milestone in Seiko's 1968 lineup. It features a Champagne dial protected by a Hardlex crystal and offers 90m of water resistance. [seikata-wm-4a7b92711473]

Also known as: Tuna

Specifications

Movement

Solar

Case Material

Titanium

Case Width

44mm

Case Thickness

13.3mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

90m

Dial Color

Champagne

Jewels

28j

Frequency

36,000 bph

Power Reserve

52 hours

Year

1968

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