Possible 1788 1/2 guinea

I had this coin and decided to look it up, I saw the numista listing and compared my coin to it. Numista says this coin weights  4.2 grams, mine is 2.5 grams. My coin has the same obverse design, but a different reverse design. This coin is very thin. Any help would be greatly appreciated, thanks.

I also have these two I would like identified. Thanks in advance.

Quote: CollieJ

https://en.numista.com/catalogue/index.php?r=spade+guinea&c=&cc=y&cn=y&cj=y&ce=y&cu=y&cat=y&mode=simplifie&p=1&e=&d=&km=&i=&v=&m=&a=&t=&dg=&w=&g=
 Look at the last four on that link - it is an imitation

Quote: CollieJI also have these two I would like identified. Thanks in advance.

Second item is like one of these three ...
https://en.numista.com/catalogue/pieces29785.html
https://en.numista.com/catalogue/pieces49886.html
https://en.numista.com/catalogue/pieces42705.html

 First item is like in this topic, from three years ago ...
https://en.numista.com/forum/topic7996.html
 or in this topic ...
https://en.numista.com/forum/topic18171.html

If your coin is almost half the weight of a genuine coin then there's no way it's real.  It could be a gambling token.