Round Belgian Military Medallion - 12th ?

This one is a bit on an unknown I'm afraid, any clarifications are more than welcome. I'm confident this is belgian with the lion rampant and the colouring. There is the number 12 written at the bottom and behind the lion could be a black L so wondering if this is referring to a 12th Legion or something. I know not though so please perform your own research. Nothing inscribed on the back to help with identifying the subject or even what it's made from so please take a look at the pictures and ask any Q's before bidding.