Coins and banknotes with a face value of 3
efisha.com
efisha.com
having both a florin, and half a crown. So thats an each-way bet, two shillings, or two shillings and sixpence. Was there a crown? No. we don't do that. (fact: did. its the commerative coin your granny gives you)
But if you found a farthing (and I did) you could get a chewy toffee for a farthing at the shop. (the farthings mostly had queen victoria on them. Pennies, I had every George since the IV through to liz, I liked the victoria ones best) Something broke when we switched off duodecimal. Measurement, totally made sense. Currency, you can divvy up 12 so many more ways than 10, amongst people.
I totally lost it when I found Australia had $2 notes. FFS just hold two $1 notes. Then $2 coins. Mind. Blown.
3d was a great coin. Too many sides to count. Kids totally don't appreciate the weight of confusion when size of coin has no bearing on face value, or that you could be slipped something which was legally, technically sixpence, but made of silver. Not cupro nickel plate: silver. I never saw a real guinea, I know my dad did. Posh shops priced in Guineas for the extra shilling. Jenners on the high street.
I think "experimented" is the wrong word here when Uzbekistan and Ukraine paid with 3 kopeck coins and 3 ruble banknotes for decades before that.