Each model sheath has a different available area upon which to stamp a logo. Some large and some small. A natural preferance would be horizontal as the sheath is in a naturally perpindicular state. However, some models just don't have the room, and a horizontal stamp would either be prohibitive or have so little margin that it wouldn't be prudent to assume the guy who does the stamping to center the stamp perfectly. If I was Bo, I would have liked to see how the stamps fit each model. This of course is all speculation. I'm just trying to come up with scenarios that align with the evidence we have. I'd like to hear yours.