Brett, hi again. With your second post describing the stamp in question, I realize I misinterpreted your original question regarding "margin numbers". I assumed (incorrectly) you were referring to the plate numbers at the edges of the penny red stamp, but apparently your question refers instead to the notation about margins of the early imperforate British stamps that often accompanies the descriptions on
ebay. For about the first fourteen years of British stamps, they were all issued in imperforate format, ie there were no perforation holes separating the stamps. In addition, the spaces between stamps was quite narrow, so when you wanted to remove a single stamp, or a small group from the main sheet, which was a 12 X 20 grid comprising 240 stamps, you had to cut them apart with scissors. Unless you bought and took home the entire sheet, you would of course then have to rely on the post office clerk cutting off the amount you wanted, and again, because the gaps were so narrow, it was very difficult to get a nice clean cut and preserve the integrity of any individual whole stamp, and so the designation of one, two, three or four margin stamps came into being which refers to how well the stamp was separated from its neighbors to right, left, up or down. Here are a couple of examples, a three margin ( below, top) and a four margin copy (below, bottom). Note that the three margin copy almost clips the design at top left, while the four margin even includes a tiny bit of the next stamp over to the left. That one also shows how narrow the gaps were between stamps on these early issues, and so, how easy it would be if you were trying to cut a few stamps out of an entire sheet, to cut too close to the next stamp over, which of course the next customer in line might end up with. And, of course, that next stamp over which would have the letters OA in the lower corners would be missing part of its right hand side, and so today would be a less than desirable copy if by some chance it survived all these years and ended up in a collection.

