Vintage Speakers Made In Yugoslavia Vintage Speakers Made In Yugoslavia

Cleaning out my mom's attic. She has no idea where these came from. Vintage 3-way speakers, made in Yugoslavia. Don't know anything about them. The connection appears to be an RCA input, I have no way of testing these to see if they are working. Sold as is therefore, you either know what these are or know how to fix them if they are not working. That I cannot tell you. 

Any questions feel free to ask, I will try to answer them