"Astrolabio" astrolabe Astronomical instrument Antique but how old

I found this at a dimly lit estate sale. I liked it right away even though it is incredibly dirty and worn. At first I thought it was made out of stone due to the excessive chipping but a magnet holds firm from the top and even stronger on the bottom. Its in a foreign language except the bottom label. It measures 3.5' across and weighs 2# 2.2 ounces. I have no idea if its real or reproduction. Any help would be greatly appreciated.

 

the label on the back is a pretty good indication that it's a modern reproduction..

 

Agree. It's made to look old.

 

I'm with the others.