Mystery coin! Please identify??

[florencepugh 0]

Hi there. 

I found this coin washed up on a beach in the Bahamas. Does anyone know what it is/where it's from?

Thanks!

[Mr T 189]

What does the text around the rim in the first image say?

[florencepugh 0]

I'm not entirely sure because the writing is not clear but the parts I can sort of make out look like they say "Michon Michelec dlyon Messie" and I think the date says 1920. The word Tide has also been carved into it.

[bagerap 706]

The lion rampant is similar to that of Czech/Bohemian coins and possibly Belgian. The whole thing has an appearance the far predates 1920 so maybe it's a medal or commemorative restrike. Could we have the diameter and weight please?