Seiko Cal. 4447 - 721

Seiko 4447-721

The 4447-721 is a sought-after Quartz piece from Seiko's golden era. Powered by the 4447 caliber with 19j jewels beating at 28,800 bph, it delivers a 43 hours power reserve. [seikata-wm-181f23d05be0]

Also known as: Bullhead, Sportsmatic

Specifications

Movement
Quartz
Case Material
Stainless Steel
Case Width
42mm
Case Thickness
15.7mm
Lug Width
22mm
Crystal
Acrylic
Bezel
Fixed
Water Resistance
90m
Dial Color
Cream
Jewels
19j
Frequency
28,800 bph
Power Reserve
43 hours
Year
1990

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seikata-wm-181f23d05be0