Possible errata in booklets of 1975 Liberty Bell 13 cents -- 24 stamps, not 23??
Back in 1973-1975, I guess, I picked up two booklets of 13 cent Liberty Bell stamps -- just the usual ones being sold at the time. When I got home, I realized that there was something weird / wrong -- the booklets claim to have 23 stamps in each, but in fact both have 24 -- three full sheets of eight stamps.
I knew (and know) rather little about stamps, other than "errors and weirdnesses can indicate value", so I put these away in a desk drawer until "later", which turned out to be today. "Oh yeah, those things."
Any thoughts about these? All the sheets are intact, of course; otherwise, they're in good but not pristine shape (see the pics). A bit of googling didn't reveal anything similar out there; might there be any value here? Thanks!