What is a proof coin and is this one? How can you tell? And would this penny be worth anything other than face value thanks!
Welcome! A proof coin is struck on special polished planchett by a specially polished set of dies. Unfortunately yours isn't a proof coin.
Ya, it probably worth face value. Possibly a couple Lenny's over face value, not too many Lenny's over though.
Your Perth 1948 penny is much rarer than the Sydney penny of the same date. Sydney = 26,625,600 penny coins, Perth = 1,533,600
I have no gauge of what condition the coin is in, but here’s is a link that shows some values based on the grade. https://www.allcoinvalues.com/australian-coins-and-notes/1948-y.-australian-penny-value.html