I'm unable to post a pic at this time, but here's a description: It's smaller than a present-day U.S. dime. It's copper (I think), with a silver-colored "cameo" inlaid portrait of Queen Victoria in the center. This cameo has a small "VR" on it (Victoria Regena?) There is no date, but the inscription on both sides reads "Halfpenny Model". I can't find anything in the books/online. I'll post a photo a.s.a.p. Thanks!
It is just a model coin,which is a token.It's not listed in any of the catalogues,as it was done privately. Aidan.
The World Bi-metallic Coin Club has some pics of these: http://www.wbcc-online.com/grtbrt/grtbrt4.html