Well Chris......
Of course, some of this is maybe more my opinion or personal experience rather than fact.....but here goes. Although this line (29, 62, 63, 634, and 64) only had a relatively short run (1950 thru 1956), I think they were superior carpet cleaners and superbly made. One disadvantage I think they have to the subsequent Convertible line is that they surely seem heavier and harder to push. The material that their bags were made out of never seemed to hold up as long as the Convertibles, either. I think this is especially true of the rayon bags on the 62 and 63, and the cloth bag on the 29. While it is generally known that the "dusting tools" never had great, or even good, suction, I notice that the tool suction on the previous generation Model 28 is better than these guys. Why that is - I am not sure. Nonetheless, I love all 3 of these guys and sure am glad to have them!