Mavi Boncuk |
1863 Tête-bêche (head-to-head) block of ten 20pa black on yellow, red control band at bottom, mint left marginal.
In philately, tête-bêche (French for "head-to-tail", lit. "head-to-head") is a joined pair of stamps in which one is upside-down in relation to the other, produced intentionally or accidentally. Like any pair of stamps, a pair of tête-bêches can be a vertical or a horizontal pair.