I believe the E1 has the spring swings to the left for cleaning but has the wings on the spring still. Standard E2 does not have allow the spring to shift to the left. I have my E2 modified to act like a E1 and works very well & like it very much. Schick Injector Razors Schick injectors - A comprehensive guide @mata_66 made a great reference time line for us to figure what Schick we have. He is good at making a decent reference for us to enjoy. Have some great shaves!