I recently purchased this Henry Wilkinson & Co pitcher from an estate sale. I noticed on the bottom a few engravings which I’ve not seen before. Just under the HW & Co hallmark, there is a number W7/55. There is also a number at the top 536797. I know in general electroplated silver is less valuable but is it possible that this is a rare piece that may be worth something? Does anyone know if Henry Wilkinson & Co numbered their pieces or put serial numbers on them? Any help is greatly appreciated.