What is the value of a 1957 CCCP coin?

Answer 1

"CCCP" isn't a denomination. It's the abbreviation for USSR using the Russian alphabet. The Soviet Union didn't make a 20-ruble coin during the 1980s so presumably your coin is a 20-kopeck piece (spelled "копеек" in the Russian alphabet) and was one of the smaller denominations. It had very little value at the time and has of course been supplanted by the coins of the Russian Republic following the collapse of the Soviet Union.

Answer 2

Without knowing its denomination it's not possible to give a specific answer. Please read the explanation below and post a new, separate question.

"CCCP" are the Russian initials for the (former) USSR. Your coin is lettered using the Russian alphabet so you can't just read its denomination like you could a German or Spanish coin. It will be denominated either in:

> kopecks - копе́йка in Russian

> rubles - рубль in Russian

so if you can find one of those words you can post your new question.