The model 65 was the first convertible. It had a two speed motor. The 29 did not. The 65 also had a differently shaped agitator. The 29 did not use disposable bags, where the model 65 did. The 65 was lower to the ground, and lighter in weight than the 29. The 65's attachment converter slid in from the back, the 29's converter slid in from the side.