P. Green writes: We found some old coins, most say 10 or 20 corona from 1905, 1909, 1911, 1848/1908. And another one – 20 mark deutsches reich 1895. Could you please tell us where these are from and what is their present value?
The 20th Century 10 and 20 Corona are from Austria and are gold coins. They were trade units and were minted in large numbers. Except for some exceptions, they are essentially bullion related items.
- 10 Corona=.0980 oz pure gold content
- 20 Corona=.1960 oz pure gold content
You don’t say which is which, but if you have a 1909 20 Corona, that would be quite valuable. It is worth somewhere between $400-$2000 depending on condition. The 1911 20 Corona is also scarce and brings $100+. There is no 1848 Austria 10 or 20 Corona but there are similar coins called Ducats with this date (.1106 oz pure gold)
The 1895 German (actually Prussia) 20 Mark (.2304 oz) is another example of a high mintage trade unit. If you want to figure out the base value for these coins, simply multiply the decimals above against the world price of gold in dollars.