This is a Great Britain 1942 HalfPenny. It is probably a bit scarcer in nice Unc. (read MS63 and above with good colour) than most realize. I bought it and a similar 1944 coin. Rather than GTG which is fine, guess the price for both...Please not excellent ship details including the pennants...
The key is finding them with good strike, and good colour. As with later US coins, they were not saved. I'll post price tonight.