Many of the international coin collectors know the 50 real coins, also knows as "cincuentines". These are impressive coins minted in Segovia (Spain) at the beginning of the XVII century. They are all extremely rare.
Here you have more information about them:
http://historicalcoinmarket.com/50-...618-segovia/And here it is the last one on an auction (which I tried to buy for a client but I could not):

It is not difficult to find images of cincuentines, but we only see two of the three sides of the coin. Luckily, here you can find some photos of cincuentines edges. I hope you like them:
https://www.amazon.com/clouddrive/s...LEhcxbU2rzTu