It's an interesting gun in great shape. Looks being original on pictures. Note the 5-digit s/n is stamped vertically on the hammer, just like an Italian Contract pistol (there are also some Italian with horizontally stamped hammer). The hammer on non-Italian Flatside is usually stamped horizontally, 3-digit. But those are later Flatside (later than this one). On this so called "Early Flatside", I would believe this is a split-hair sub-variation due to its special hammer stamping, although I have also seen early flatside with 3-digit horizontal stamped hammer. Everything on this one is same as Italian, except markings. You must be very proud to own this one.