One Fifty!
No Contest, 1936 and it had an automatic height adjustment that still works even on todays carpet, two speeds, a plug in hose connector and a time to empty signal,and it cleans great, just about every cleaning contest in years past that a 150 entered it won., a 60 ,61,2 and 3 are really the last great Hoovers, Convertibles are good, but really not in the class with the earlier machines, the Dial A Matic probably is the most important thing Hoover ever built because it was the prototype for all modern cleaners.