661-Pete said:
There were older threepenny bits than that! I can still (just!) remember the old silver 3d...
Here is my treasured one remaining 'Joey' - silver threepenny bit, photographed alongside a modern 5p so you can gauge the size. It really is tiny, and a lot thinner than the 5p. But it is pure sterling silver - unlike modern coins. The other side is a portrait of George V. I'm not an expert at macro photography, this is the best I can do.
I've been surfing around and uncovered an extraordinary fact.
This coin is still legal tender. In fact it's the only coin which was in circulation, pre-decimalisation, which still
is legal tender (the 12-sided threepenny bit is not). Its nominal value has been upped to 3p instead of the original 3d (=1.25p). Apparently the reason is because it's indistinguishable from the 3p in the special 'maundy' coinage which is by law defined as legal tender - though no-one in their right mind would spend it!
But the market value to a collector, of a coin like this - if it's in reasonable condition - is around the £1 mark - not immense.