Cor blimey. Is there anyone on this forum who DOESN’T remember £sd ?
I've still got a full set of predecimalisation currency. As we had access to supplies of coin we investigated the possibility of producing presentation sets of old currency.
We could get bags of coin straight from the mint, we had a printer who could cut out cards to hold the coins, and we knew a plastic guy who could make wallets for us.
All legal and above board - we would buy the coins at face value from the bank.
We never took it on because it was soon obvious that most folk were more than happy to see the back of the stuff.
£.s.d. was not lamented at all.
But I kept one of our test samples, for old times sake.