Hmmmmm i think you might not be reading correctly Nicholas, it looks to be that its probably not genuine. The S looks very squint also compared to all the Lockett Plate pictures, the majority of those seem quite straight, that can of course be down to the strike, but looking at the both would make me wonder and also the RD stamped on the right hand side. Be cautious and don't get annoyed or upset at what the forum members might say, they are trying to help and Rob and historiccoinage are both very knowledgable in this area