Seiko Cal. 4447 - 740

The Seiko 4447-740 represents an important milestone in Seiko's 1973 lineup. Powered by the 4447 caliber with 29j jewels beating at 28,800 bph, it delivers a 72 hours power reserve. [seikata-wm-773f6d8dd43b]

Also known as: Sumo, Baby Tuna

Specifications

Movement

Solar

Case Material

Titanium

Case Width

41mm

Case Thickness

12.1mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

170m

Dial Color

White

Jewels

29j

Frequency

28,800 bph

Power Reserve

72 hours

Year

1973

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