Seiko Cal. 4521 - 372

This Solar model from 1976 features a 43mm Titanium case. Powered by the 4521 caliber with 31j jewels beating at 36,000 bph, it delivers a 61 hours power reserve. [seikata-wm-623a64a8634b]

Also known as: Tuna, Silverwave

Specifications

Movement

Solar

Case Material

Titanium

Case Width

43mm

Case Thickness

10.7mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

180m

Dial Color

Champagne

Jewels

31j

Frequency

36,000 bph

Power Reserve

61 hours

Year

1976

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