The Flat Bottom Tech has kind of a funny name-- the bottom of the head is actually curved. But, it lacks the large diamond-shaped protrusion stamped into most Tech baseplates. It also holds the blade quite a bit differently than other Techs, yielding a more efficient and more aggressive shave than even the Triangle Tech. This one, made in Germany in the early-to-mid 1950s, is all aluminum. It is in excellent shape, and its light weight makes it feel nimble, though some may prefer something with more heft.