Collocation of 6 single stamps and 3 horizontal pairs = 12 stamps, as well amongst other things 10 / 11x from corner margin top left, 18y from corner margin lower right, 14 / 16B always from corner margin, 12a and 12aI in the horizontal pair, 12bx and 12 bxI in the horizontal pair as well 12by and 12byI in the horizontal pair, Michel in total = 1. 110.- (photos see Internet!)