Some stamp booklets issued 2016-19 in full uncut sheets have stamps that are partially imperforate. Press sheets of sheet stamps don’t have these imperforate varieties – only booklet press sheets do. When these sheets are finished into booklets, the booklets are cut apart. But on unfinished press sheets the booklets remain attached. This makes some stamp blocks and pairs horizontally or vertically imperforate between – where the cut would have been made between two different booklets. Collectors and dealers don’t know these scarce modern imperforates exist, so they aren’t being saved. We were lucky to obtain some of the past few year’s sheets after learning of their special varieties. We know these stamps are very scarce, with few sheets produced and sold. (Only the US Postal Service knows exactly how many!)
20 records.