<span style="font-family: trebuchet ms,geneva; font-size: medium;">The Electrolux G that is 'featured' in this thread has the top-mounted PN port as an aftermarket upgrade. </span>
<span style="font-family: trebuchet ms,geneva; font-size: medium;">Electrolux had originally placed the port in that location with the Model F (the first Electrolux to have a power nozzle). </span>
<span style="font-family: trebuchet ms,geneva; font-size: medium;">Then when the first G came out, the port was integrated into the front cover, down at the bottom near the hinge. (You can't see it in the photos above but I know it's there due to the front axle being so close to the front cover.)
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<span style="font-family: trebuchet ms,geneva; font-size: medium;">The front-cover location for the PN port proved to be problematic for several reasons, not the least of which was that the plug tended not to stay plugged in. So branch offices offered replacement trim strips with PN ports to customers who wanted them.</span>
<span style="font-family: trebuchet ms,geneva; font-size: medium;">Then when the next version of the G came out, they put the port on the right-front side of the machine and moved the wheels back to make room for it.</span>
<span style="font-family: trebuchet ms,geneva; font-size: medium;">As for the one that has the front-side port and the top-trim port, I dunno. All I can say is that much later when Electrolux sold factory reconditioned machines, they provided the top-trim port regardless of whether it was a newer or older G. That was done most likely for consistency's sake and not having to show multiple port locations in the very basic instruction folder that came with the rebuilt machines. All three machines in that series -- E-A, F and G were done the same way when rebuilt, with the top-trim ports.</span>
<span style="font-family: trebuchet ms,geneva; font-size: medium;">Electrolux men would also often try to sell power nozzles to people with older models. With the E-A and F, they'd install a new top-trim piece with the PN port. With Models E and S, they'd add a little square metal box on the underside of the machine behind the front wheel for the PN port. </span>
<span style="font-family: trebuchet ms,geneva; font-size: medium;"> </span><span style="font-family: trebuchet ms,geneva; font-size: medium;">I've seen a couple of LXs with PN ports, but have never seen an XXX with one.</span>
<span style="font-family: trebuchet ms,geneva; font-size: medium;">It may be that the original owner of the second Model G shown above didn't like the right-front location of the port. It =is= klnd of inconvenient and hard to reach, especially for people who have trouble bending over. Maybe the Friendly Electrolux Man recommended the new top-trim port to address the person's dissatisfaction with the lower-right port.</span>
<span style="font-family: trebuchet ms,geneva; font-size: medium;">I hope this rambling makes some sense!</span>