[hcv123]

The Clemente was issued in packs as 9 separate stickers/stamps - making up 1 of a couple of "puzzles" from the set. You will note on the back there are 9 individual numbers 201-209. They have been available as full sheets for a long time - not sure where/how the sheets originated. It was only when PSA started grading the " 3 stamp panels" that I recall seeing the 3 stamp panels. My educated guess is that people who had full sheets cut them into panels of 3 as that is the only way PSA would grade them at the time. The sheets are not easy, but findeable - considerably more expensive since PSA started grading them.