Rivstg1, I have a 1957 Kirby 517, 1971 Kirby Classic 1CR, 1974 Kirby Classic Omega 1CB, 1977 Kirby Classic III 2CB, 1984 Kirby Heritage II Turbo 2HD, and a 1991 Kirby Generation 3. Hopefully soon I would love to get one of the 40’s, early/mid 50’s, and 60’s Kirbys.