Seiko Cal. 4531 - 660

This Automatic model from 1980 features a 41mm Titanium case. Powered by the 4531 caliber with 36j jewels beating at 21,600 bph, it delivers a 57 hours power reserve. [seikata-wm-eb3627f5457f]

Also known as: Tuna

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

41mm

Case Thickness

12.1mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

60m

Dial Color

Burgundy

Jewels

36j

Frequency

21,600 bph

Power Reserve

57 hours

Year

1980

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