Coin identification

Dear all 

Could any one help with identification of this old hammered coin please 

This coin is silver 

5.2 g , 28mm. , 1.6mm thick 

It looks like long cross with inner and outer circle

other side not very visable but looks like one outer circle with lettering across the coin 

never seen any before 

please help 

and sorry for the picture This is best what my phone takes:(

1400-1500 groats got similar pattern with cross, two circles of text and three letter groups in middle circle, but they are around 2.8-3 gram. Earlier English/Scotish ones tended to be on heavier side.

You can find examples in Belgium, Scotland, England, France.

Not a lot left to identify. Even letters are barely visible