Need to ID Great Britain coins

And here is 2 more coins that I need your help to ID them.

The first one is like a shilling but material is different. Original coin is made of Ag.


The second one has reverse like a 6 pence or shilling but size is too small as you can see on the image. And material is not Ag.


My version is that they are both forgeries. But the question is what forgery the second one. I can't find information about coin with such size (13-14 mm)

I also have a coin like the George III although mine seems to be made from brass. My thoughts on the coin was that maybe some one made forgeries of a shilling cast in brass in the hope they could pass them off as some sort of gold coin.
Dave.

Hi
Interesting coins . The first one certainly looks like a George III silver shilling , the interesting point is the heavy circulation wear !
The white metal plated ! coin certainly copies designs from larger coins . could it be just  a medalion type souvenir issue . I have certainly items with similar appearance