That is a blue crane on the back of these neat coins from South Africa. The pattern on the front changes on some coins, but the back with the blue crane stays the same. All of these coins are modern and made of non-precious metal. The value is low:
worn: less than $1 US dollar approximate catalog value
average circulated: less than $1
well preserved: $1 fully uncirculated: $2
Wow, Jason. It would be something if you have a genuine Continental Currency piece. These are worth tons of money. Our picture, of coure, is a replica, worth essentially zero. Note the word COPY tucked neatly away in one of the circles on the reverse.
NEVER CLEAN A COIN. CLEANING RUINS VALUE.
Here is what the Red Book, the definitive US coin catalog, says about your coin:
worn: $7,000 US dollars catalog value
average circulated: $21,000
Australia issued these coppers from 1911 to 1939. After that, kangaroos appear on the back of penny and half penny coins.
Most of the pre-39 pennies and half pennies are low in value. Below is a list of approximate catalog values for just about all the dates in the penny and half penny series. Special *better date* coins appear on this page after the common date values.
PENNIES (COMMON DATES BEFORE 1932)
worn: $1 US dollar approximate catalog value
Between 1974 and 1987 France minted 10 franc coins in a copper alloy, either nickel-brass or nickel-bronze. Before 1974, 10 francs were in silver, and after 1987, 10 francs returned to collectible silver and gold coins, with a few years of nickel 10 francs as well.
The copper alloy coins make for interesting collecting. The pattern shown in our picture is the 'standard' pattern for this type of coin. But several other patterns were produced as well, all of them very pleasing and artistic. In general, the 'special' pattern coins are worth slightly more than the 'standard' pattern:
Just about all of Swiss 5, 10, and 20 rappen coins are minted in copper nickel. The one in our picture is special ~~ it is minted in brass. Copper nickel coins are lighter in color, but the pattern is the same. Some coins were also minted in aluminum brass, which takes on a golden color.
These long-running series have a few special dates, but most are worth less than $1 US dollar in average circulated condition. Here is a run-down on these three coin series. Values shown are for coins in well preserved condition, like our picture. If your coin is not a nice as the picture, it will be worth substantially less. If your coin is fully, absoluately uncirculated, then it will be worth about twice these values:
These are beautiful old coins, Rachael. The fact that your coin is bent, however, will lower its price to gold bullion content alone. There will be no numismatic (coin collector) value over and above bullion value for bent coins.
Here are the statistics:
10 CORONA: 18 mm diameter, 0.098 troy ounces gold
20 CORONA: 20 mm diameter, 0.196 troy ounces gold
To find bullion value use a web site like kitco.com to find the up-to-the-minute price of gold. Then multiply that dollar amount by 0.098 for 10 coronas and 0.196 for 20 coronas. At the moment, kitco reports $1290 US dollars per troy ounce, so Rachael's coin is worth $1290 x 0.098 = $126 (Base value=BV). If you go to sell this coin to a gold dealer, he or she will charge you a commission for handling the transaction. For a single coin, a reasonable commission would be 20 to 40 percent. If you had 100 coins, the commission percentage would be lower.