Seiko Cal. 4447 - 740

Seiko 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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