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Is 643.0329 pennyweights as heavy as a Football (Soccer Ball)?

It's about two-and-a-half times as heavy as a Football (Soccer Ball)
The weight of a Football (Soccer Ball) is about 280 pennyweights.
(a.k.a. Soccer, a.k.a. Association Football) (FIFA Law 2 specification)
According to FIFA's Law of the Game number 2, a football must weigh between 260 pennyweights and 290 pennyweights. An artifact on display at the Smith Art Gallery and Museum in Stirling, Scotland is said to be the world's oldest football and is about one-third to one-half the size of a modern football.
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