Assistance On Identifying Large Copper With Maria Theresia On Obverse (18th Century Irish Halfpenny)

I bought a box of mixed goodies from a dealers table at a small flea market on the country side where I live and this coin/token has me completely stumped.

I searched online for a few hours and went through 20+ pages on Numista and still cant seem to find one that matches, I'm not sure if this is suppose to be a penny or a token, and of course it is extremely warn down but you can just see a faint bust of Maria Theresia on the obverse and a crown on the reverse.

I have been using the crown as a way to try an find a coin/token that matches with zero luck and I was hoping there was enough detail left for someone on here to maybe be able to identify.

Coin in question specs

Weight is 6.5g
width is 26.80mm (possibly originally 27mm)
Thickness is 1.50mm

I took these photos on somewhat of an angle so you can see the faint bust and details that are left.






Any help would be appreciated.