Although no one has complete accurate history of Aerus LLC Tom Gasko (dysonman1), Jimmy (rugsucker), Ray (BikerRay), John (tig21er), Dave (DJub85) and Tom (Gr8DaneDad) also have an ample amount of information about Aerus/Electrolux products. I only offer this as a point of reference but dislike the fact that other knowledgeable persons of Aerus/Electrolux product information and history have inadvertently been excluded; my apologies to them.
To illustrate the incompleteness of Aerus history some years are speculative due to lack of company records either as a result of inadequate keeping initially or purging information as company headquarters were relocated over the years. Indeed, in order for stock to be rotated, so older machines were sold before newer machines, lists of serial ids corresponding to dates of production were prepared and distributed to branch offices. However, none of these lists have been retained at Corporate, so Aerus is unable to give the exact year of production for machines older than sometime in the 1980s. Aerus has acknowledged that the serial prefixes and suffixes (a single letter prior to and after the 5-digit production number) are random--unlike some companies' serial ids in which letters or digits corresponded to months or years. In addition, some individuals at Corporate convey a disinterest in detailed company history.
Examples of debatable data can be seen in the claims of some that the Model XXX had a 17 year run (1937 to 1954) when in actuality its run was interrupted by WWII, and immediately afterward--in 1945 and 1946--machines were assembled (not newly-manufactured) from repair parts and were sold to those who had made down payments to be on a waiting list when machines were again available. Regular production was resumed in 1947 attested by the fact that there are no manuals copyrighted 1945 or 1946. Moreover, the Model XX had a brief run from late 1941 to 1942 in an unsuccessful attempt to replace the Model XXX.
Among other ambiguous data, there is also disagreement as to when the Model R and Model G were introduced. Manuals are copyrighted 1960 in both cases, but some persons say 1958 was the initial year for the Model R and some--including Electrolux's 50th Jubilee plate--say 1961 was the year Model Gs were first sold. Along with this is the fact that machine's designs--as with most companies--were altered at various times throughout the model runs which makes the years changes took place hard to pinpoint. Attachments, too, can be hard to trace to certain years--especially those of the Model XXX which had plain metal, metal with various colors of bumpers, black bakelite, blue-gray bakelite, and those painted in hammertone teal (during the simultaneous run of the Model LX whose color was teal).
Vacuumland exists, in part, to share information with one another and to help "clean out the cobwebs" of misinformation or missing information through discussion and debate. One would speculate that although complete accurate Aerus/Electrolux information is unavailable Axel Wenner-Gren would be pleased that his vacuum cleaner legacy has continued into the 21st century with the current worldwide manufacture of Electrolux, Lux, and Aerus products as well as collectors' conversations such as this one.
Eluxurious blog - featuring more recent Aerus history:
http://eluxurious.blogspot.com/p/the-9000-guardians-have-taken-over.html