Super coin, Klaus! With valuable coins like yours, one must always look out for counterfeits. If yours is a genuine coin from the old German State of Brunswick Wolfenbuttel, it is a valuable one.
The coin in our picture comes from Jean Vinchon Numismatique in Paris. It is certainly a beautiful specimen of the 5 thaler.
CoinQuest thanks Jean Vinchon for use of his coin image.
If you have a coin like this and it is in good condition, seek out a collector or coin dealer who can help you evaluate your holding. The values on CoinQuest are very rough estimates, and your coin may be worth far more (probably not less) than our values shown. Here are some approximate catalog values for these coins:
2 1/2 THALER, 20 mm diameter, 0.0961 troy ounces gold
circulated: add $200 US dollars to basic gold value
uncirculated: add $800 to basic gold value
5 THALER, 23 mm diameter, 0.192 troy ounces gold
circulated: add $400 US dollars to basic gold value
uncirculated: add $1500 to basic gold value
10 THALER, 28 mm diameter, 0.384 troy ounces gold
circulated: add $800 US dollars to basic gold value
uncirculated: add $2500 to basic gold value
These are very approximate prices and the actual buy or sell value will change with the condition of the coin, the eye appeal of the coin, the amount of damage on the coin (if any), the price of gold, and, of course, the authenticity of the coin. Collector demand for nice specimens will be very high.
To compute the basic gold value, use a web site such as kitco.com.