Hi Knoxfrzb.
Unfortunately with the attachments in front of the runners, nobody can see the machine well enough to tell.
There are a number of ways to tell a pre-war from a post-war XXX. The color of the leatherette, the paint on the body of the machine, the runners, and the doors on the blower end to name only a few. The model XXX started in 1937, and ran till the end of 1954. Naturally, Electrolux was not making vacuum cleaners during WWII, as they were making what were called "motor's that fight!" (Generators and what have you.) Once they were given the go ahead to make vacuum cleaners they went back to the trusty XXX. The early XXX's 1937- the early 40's, were dark gray on both body and leatherette. The runners were flat on the bottom, and there were two or three sets of vents on the rear cover. Memory is failing as to if there were louver doors. Also, there was no 'Companion' (ride on tool holder), or cord winder. Those came out around 1948. The new model XXX's have the round runners, the paint and letherette gets lighter each year, till the last of them were a grayish blue, like the post-war XXX shown here. There were also the saloon doors as part of the real exhaust.
Both Charles Richard Lester and Tom Gasko are better qualified to talk about the other changes, but those are the key things to look for.
As for the attachments, they were standard equipment from 1937 to 54, with slight color changes in rubber trim. The only tool that changed was the rug tool. That design went through a number of changes during the years the XXX was manufactured.
Oh yes, I almost forgot! Look at the dust bag. If it says anything about the new automatic cleaner, then it was sold as the lower end model at the same time the LX was being sold. And I'm sure Charles Richard, or Tom can tell you the numbering system to determin the age. There should be a series of numbers on the area where the dust bag goes.
That's all I can think of for now.
Alex Taber.
