Monacoin is a very old altcoin (according their website has been created in Japan in 2014). I remember the name because "mona" is like an offense in north-east Italy
Ok geography apart,
if I am not mistaken, these have been minted by
https://sakamt.co.jp/ SAKAMOTO Co., Ltd no idea about
mintagehow many minted but in some sites show
the "sold out" label.
Other similar seems still available in
https://store.medals.tokyo/items/41949494 they call this as "medals" and not coin
however made in pure silver.
.. they are selling also with other similar items (made in pure silver)...
thanks for sharing, their products are somewhat inspiring
