What is this coin worth?

What is the value of this coin?

thanks

Hi.   

A brass one was sold here in February for CZK 1550,-Kč - at an online auction.

And it sure caught my eye - it was a medal 🏅 it has also been minted in gold, silver, bronze and copper.

Ivan

Thank you, Ivan for your informative reply. 

i see that the brass sold recently. 
How valuable is the same coin but in gold?

thank you.