What Is The Largest Coin You Have?

Yes. By no mean I am saying this is a competition for largest or smallest. I'd thought it would be interesting how would anyone that carry such a large piece of change in their back pack, or not able to find that loose change that you can't even find without a magnifier.

Thanks Sap for the link!

My large Swedish plate coin.

1742 Two Daler

Obverse


Edge


Reverse


About 7"x7", five pounds. Not too greeny. These were supposed have two Dalers of intrinsic copper value. A lot of were melted.

There are those who say that Swedish platmynt "don't count as coins". But for me, they tick all the boxes of "things you need to have to qualify as a coin".
- Made of metal
- Has face value
- Issued by a government authority
- Actually circulated as money.

For those unaware, plate money was not originally designed or intended to actually circulate. The theory was, the plates would sit nice and safe in a bank vault, while the bank then issued paper money backed by those plates. Thus, people could spend the nice, convenient paper money without having to lug around the big heavy copper things. However, paper money was still in its infancy in the mid-1700s and people basically didn't trust it, so when the people of Sweden were given the choice of owning a handy convenient piece of paper or a big chunk of copper, they almost universally said "we'll take the copper, thanks".

Thus, the experiment was deemed a failure and the plate money ultimately withdrawn and destroyed. Or sold as scrap. Apparently, the vast bulk of surviving platmynt on the market and in museums today were found in Scandinavian shipwrecks, which were using the copper as either ballast or as scrap copper trade goods, with one single wreck, the Nicobar which sunk off South Africa in 1783, accounting for most of those (about 3000 of them were retrieved). So finding a piece with little or no saltwater corrosion is even rarer than the platmynt itself.

On the subject of "world's largest coins", then a contender, if platmynt is counted as "coins", would be the largest platmynt: a 10 daler ingot dated 1644 and weighing 17.8 kilograms. However, this would then have to exclude the various giant-gimmick coins (100 kilograms, 1 tonne) issued by the likes of Perth Mint and the RCM.