Any multiple comprising stamps of different varieties, usually different face values or designs.
Many booklet panes and miniature sheets have stamps se-tenant in their make –up and such items are produced from sheets specially printed for the purpose. However, other varieties occur se-tenant due to errors of the platemakers or printers in making up plates, or because of repairs or damage to the plate during printing.
Such varieties are described as se-tenant when attached to a stamp printed correctly (see tête bêche).