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Machin Back Prints (page updated: Apr 14/02) On a couple of occasions Machins have appeared with "back prints" - 3 such designs have been used. These stamps indicated they were sold at a discount. By the way, the back print was printed on top of the gum. As such, you may not find any examples on used Machins since soaking the used stamp from its envelope/cover/piece removes the gum at the same time. I have seen less than a handful of used copies with a portion of the back print still visible (ie. less than 5). D (for "Discount") Stamps with this design: 16p mushroom      [ Aug 10/83 ] 17p blue grey      [ Mar 5/85 ] Star (Type 1) Stamps with this design: 12½p pastel green      [ May 19/82 ] 15½p pale violet      [ Nov 10/82 ] Star (Type 2) Stamps with this design: 13p reddish brown      [ Dec 2/84 ] 12p emerald green      [ Oct 29/85, Dec 85 ] 12½p pastel green      [ Nov 9/83 ] 17p blue grey      [ Nov 4/85 ]