Seiko Cal. 4447 - 675

This Solar model from 1970 features a 36mm Titanium case. Powered by the 4447 caliber with 28j jewels beating at 28,800 bph, it delivers a 67 hours power reserve. [seikata-wm-47e8b956fc12]

Also known as: Sumo, Helmet

Specifications

Movement

Solar

Case Material

Titanium

Case Width

36mm

Case Thickness

12.7mm

Lug Width

18mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

160m

Dial Color

Navy

Jewels

28j

Frequency

28,800 bph

Power Reserve

67 hours

Year

1970

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