tête-bêche

head to foot, top to tail, head-to-tail; with the head of one being placed next to the feet of the other, heads and thraws; (of one object) with a head at both ends

“Ils décidèrent de remplacer ce valet perdu par un morceau de papier de format identique sur lequel ils dessineraient un bonhomme tête-bêche, un trèfle (♣), un grand V, et même le nom du valet.” — They decided to replace the missing jack with a piece of paper of the same size on which they would draw a man with heads pointing up and down, a club, a big J, and even the word "jack."

From tête + bêche(vet), the latter being an archaic word for "double-ended," e.g. lit bêchevet (“bed with heads at either end”), ultimately from Latin biceps (“two-headed”).

a pair of tête-bêche stamps

From tête + bêche(vet), the latter being an archaic word for "double-ended," e.g. lit bêchevet (“bed with heads at either end”), ultimately from Latin biceps (“two-headed”).