Sweet Aire can...
Bill, that can L@@Ks to be in very good condition. I'll give you a buck three eighty for it. (As we said years ago.) ~~lol~~
Nice (& inexpensive) find.
[Bill, if you want, skip to the end.]
My research has lead me to believe the change was in early 1957 as it coincides with the change of vendor name producing the Sweet Aire for Kirby.
I have yet to find a bottle of Sweet Aire with the vendor name, Commonwealth Products, Inc on it. Likewise, I have yet to find a can of Sweet Aire with the vendor name, Miller Protecto Products on it. And, Commonwealth Products, Inc was formed (incorporated) on January 20th, of 1957.
*And even though Kirby timeline literature is ocassionally incorrect, or [dates of] the actual changes to the various models/manuals, don't/didn't make sense or jive [to us] (i.e. Logo change in '53, the Tradition safety switch); all evidence in this case points to 1957 for the change-over to cans.
(If someone has evidence or facts to the contrary, I would love to be aware of it or them.)
The short version is: I believe 1957!!! ~~lol~~
Cheers & hagn all,
Bill
Ps: As a side note:
*If you notice on the Sweet Aire can, it is referred to as: "Home Sanitation SINCE 1919." Which by the way, IS CORRECT!!!
Based upon the facts, 100 years of "Home Sanitation" would not be until 2019.
I do understand however, where the dates come from. George Scott & Carl Fetzer (S&F) partnered in 1914 as a machine shop, then in 1915 they actually formed as a corporation. They did not start producing vacuums until 1919 though.
Thru Jim Kirby's association working with George Scott & Carl Fetzer during WWI, he was able to see the high quality of work they (S&F) produced. He approached them with the idea of producing his vacuum designs. Prior to this, Jim's designs were used in a variety of vacuums going back to at least 1906. Premier, GE, Apex, Health-Mor (Filter Queen) & others have their roots or origins tied to Jim Kirby.
(Bill, I figured I would make use of your wonderful picture, to illustrate an example of erroneous timelines. Even with the ocassional error, Kirby (S&F) still builds the ultimate in quality.)