Yes, the pics you posted look like a legit sprocket. It's all about the forging shape and the beveled teeth. There were Lowrider brand sprockets made too with a very mirror like finish, but a very "square" forging. There are also larger tooth count sprockets made today that are pretty convincing in scale, but Schwinn only originally made them in the one smaller size. The larger ones I'm talking about seem to come in different grades of finish too...