I even have smaller ones in my collection, like AV 1/32 Dukaten from Regensburg/ Nurnberg/ AV 1/4 Fanams from Medieval Indian Kingdoms! Here is a 1/32 Dukaten ND Regensburg (1700) Holy Roman Emperor Leopold I 5mm. .09g. Basically, one should never handle coins/ coins are there to admire visually only. I keep mine in saflips/ or TPG slabs. I also have some like my 1969 Biafra Proof AV set in original presentation box. John
This is what my innocent little pea shooter looks like! Panzerman, sorry for hijacking your thread! (photograph from https://www.saysuncle.com/2009/07/27/race-gun/)