During the printing of stamps for booklets, the pages of stamps are usually printed in multiples from a larger printing plate. This can result in tête-bêche pairs. Most booklet stamps are printed in sheets, each containing 4 booklets.
When creating stamps for booklets, the pages are often printed in groups from a large printing plate. This process can lead to pairs of stamps facing each other.  Most booklet stamps are arranged in sheets with four stamps per sheet.