An excellent example of the SG57 10d Brown, with 4 margins, good colour, clean surface and very sharp embossing. The clear evidence of the threads on the reverse and the edge of a 2nd stamp on the right hand side gives confidence that this is SG57 and not a postal stationery cutout. The Stanley Gibbons Concise Catalogue 2023 lists these between £1500 and £1750, depending on Die number, which are usually difficult to ascertain. Please see all the various photographs to help make an informed decision, as they are an important part of the description. This is a no reserve, low start auction, so must be worth some bids!