Coin replica ID

Hello,
I would appreciate your help in identifying the original coin that used as a model for this (rather heavy) one. The only word that souns familiar and is written on it is "boemia". It is 3.3cm in diameter and 3mm tall

Thanks!

 

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The only help I can give before I have to rush off to work is the bottom inscription might be "King of Bohemia by the grace of God."

Steve

 

The interior reads: Primus Karolus

Google search shows it in silver

 

You might ask the guys and gals over in the 'world'/'ancient' forums. You'll probably get some good leads.......welcome to the forum.

 

Thank you!
I just posted there.
On the coin it says Karolus primus, which should be Charles I of bohemia, but the only KAROLUS I I found reigned 1916-1918

 

... and this design is consistent with 14th century grosch

 

http://en.numista.com/catalogue/pieces81650.html

 

I think you've got it!
Thanks!
Is there any info on official replics made in golden colour?