Found this old coin while renovating

[Neko]

I own an apartment building that was built in 1835. I found this coin behind a wall and was wondering if anyone can identify it. It is copper and does not have a reeded edge. The reverse is worn smooth. It weighs 5.7 grams and is slightly larger than a quarter.

[JKK]

The diameter and weight would make a big difference.

[Just Bob]

 

Looks like a George II halfpenny. The original weight was 10.3 grams, and the diameter was 30mm.

[Neko]

Thanks Bob. That looks exactly right! Oldest coin I've ever found in that old building.

[DWLange]

A lot of the George II and George III halfpennies that circulated in both the UK and America were counterfeits, since the Royal Mint never made enough of the real thing. Your coin is a bit too worn to determine whether it's genuine or a contemporaneous counterfeit, but both are collectible and have value.