New answers tagged prayer-book
You find this a lot in older Sefarim. Usually you can find these in the margin closest to the binding - often hidden in the binding. It seems that this was how they differentiate between versions. Like between Pessach, Sukkoth and Shavuoth Machzorim, which use plenty common pages. In the case of the Machzor Rabba, they really used the same text for both ...
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