That usage in the US has gone away decades ago. It was current when typewriters were a thing and was used then, but since computers came around, nobody abbreviates pound as #.
================================================================
On the contrary, it's used all the time, both as an abbreviation for pound, and even more so, as an abbreviation for number, as in #6 shot... which gets swapped for #4 shot if you move to steel.
Biting the hand that feeds IT
