hi all purchased this coin from estate sale with some outher stuff still to photograph can any one tell me what it is is it the london mint mark on the outher side the estate sale was a ex employee of the london mint in the 50s could it be a trial could it be the trial for the 1951 festival crown in cupro nickel there is a lot off stuff in teachest to go through hope to have some more latter forgot to say item in australia

