I have been checking out pictures of the Lecoultre and other French/Swiss framebacks with the replaceable blades and the first question that pops into my head is how they hell did they manage to cut the slot in the frame/tang the the appropriate internal slots to lock the blade into place, especially at the heel?? Did they cut the slot and then solder in a "plug" at each end? I read that Lecoultre was a watchmaker so you figure if anyone could figure out how to do work like that it was them. Wild looking razors!!!!