It definitely looks like somethign was applied. It's not uncommon to find cards of coins made up of various reigns (coming out of China) - some of these are actualy stuck on with glue - so it's not beyuond the realms of possibility but Sap's probably right with some sort of gold paint.
My
Papal States coin collection: https://diadumenian.com/Papal%20Sta...0States.html
Medieval coins collection: https://diadumenian.com/Congressofp...0Europe.html
Indian Rupee Collection: https://diadumenian.com/Congressofp...0Rupees.html
Minor world Silver: https://diadumenian.com/Congressofp...20coins.html
Papal States coin collection: https://diadumenian.com/Papal%20Sta...0States.html
Medieval coins collection: https://diadumenian.com/Congressofp...0Europe.html
Indian Rupee Collection: https://diadumenian.com/Congressofp...0Rupees.html
Minor world Silver: https://diadumenian.com/Congressofp...20coins.html




















