It's impossible to say without knowing the coin's denomination and condition.
Please check the coin again and post a new question. Great Britain has never used dollars, only pounds sterling.
This is like asking "How long is a piece of string?". You have to state which coin and describe its condition.
A 1957 Great Britain half penny is not worth a whole lot. You can buy them on eBay for $2 or less.
If it's a copy, it's not worth much of anything. At best, it's worth its metal content.
You can find a 1898 half penny for sale online for $8 or less. This is for one from Great Britain.
Please post a new question with the coin's date and country of issue. If there's no country on it, a one penny coin is most likely from Great Britain.
1913 Type 1 is valued from $14 to $37000 depending upon the condition of the coin.
20.00 I thiink in Europe and in Great Britain in 1980,s but now probably worth nothing
If it is in a sealed box, it was made for collectors.
In order to give an accurate estimate, the coin should be seen. I suggest you take it to a coin dealer and have it appraised.
Please look at the coin again, it's likely a half dollar. No dollar coins were struck in 1913.
The value of a République Française 1913 50 centimes coin can vary depending on its condition and rarity. In general, a well-preserved coin may be worth around $3 to $10 to a collector. It is recommended to consult with a numismatist or use an online coin valuation tool to get a more accurate estimate.