Seiko Cal. 4431 - 444

This Solar model from 1975 features a 45mm Titanium case. Powered by the 4431 caliber with 24j jewels beating at 21,600 bph, it delivers a 63 hours power reserve. [seikata-wm-6b16d03a3794]

Also known as: Sumo

Specifications

Movement

Solar

Case Material

Titanium

Case Width

45mm

Case Thickness

13.3mm

Lug Width

22mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

70m

Dial Color

Navy

Jewels

24j

Frequency

21,600 bph

Power Reserve

63 hours

Year

1975

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