for showing us the scans of the backs of those three minisheets/souvenir sheets.
The perforation extravaganza on each is clearly visible, and quite astonishing. Some observations:
• The wandering perforations don't enter the postage stamp in the middle of each sheet. That wasn't clear from the "face" images.
• The tilde-n [ñ]
on each postage stamp appears to be punched through the paper (or at least deeply incised). Does light pass through the tilde-n?
• Each minisheet/souvenir sheet has four portions of horizontal perforation lines not actually adjacent to the postage stamp. Each of those appears to have a periodic pattern of two regular perforation holes followed by a perforation shaped like an epsilon [ɛ]
. (I'm guessing it's "E' for España.) I hadn't noticed that from the face views. Does light pass through the epsilons?
• If anyone wanted to remove the stamp from the middle of such a sheet, surely there would be a high probability that the "selvedge" (the wide surrounding parts of the minisheet) would tear along some of the wandering perforation lines rather than just along the straight lines of perforations. Arguably each minisheet/souvenir sheet comprises one postage stamp and eight cinderella labels, so I imagine that any attempt to separate off the eight cinderella labels would be very difficult to carry out successfully...
Thanks again for those added back scans — even more revealing than I had anticipated!