You have what many would say is Electrolux's finest!  Yours looks to be in terrific condition.  The G's are stunning visually and run so quietly almost all you hear is the air rushing through the nozzle.  To answer your question about the powernozzle, Electrolux introduced their motorized powernozzle with their previous model, the Automatic F, and the G came with the same PN1 but with the new color scheme.  They're very hard to find though, because the entire wand was plastic and prone to breaking.  A later version of the PN1 with a metal wand would still look fine and be more durable.  There have been lots of posts with pictures recently about the model G and the PN1.   Do a little searching for "Electrolux G" or "PN1" and you'll come up with a treasure trove of info about you new acquisition.  Giving the motor a thorough going-over would be a good idea, especially if you're detecting an "electrical smell." 

BTW, I like your dinette set too!

Neil 

Yes, the bumper behind the plug was standard and was supposed to prevent the plug from being snapped off when the cord was being sucked into the winder.  

The first version of the G had the "bumper" on the cord and the outlet for the powernozzle cord was located on the front below the automatic adjustment knob.   Later versions had a different type of cord with molded plug and no "bumper" and the powernozzle outlet was moved to the side, ahead of the wheel.   Electrolux kept tweeking their designs and made lots of small changes within the run of each model. 

The automatic control is a sophisticated full-bag alert system.  It works by responding to the difference in air pressure between the hose inlet and the fan.  We all know as a bag fills suction is slowly reduced.  With this system, when the bag is full, or at least plugged with fine dust so that suction is reduced it "automatically" shuts off the motor and pops open the lid and says "give me a new bag!"  Well, it doesn't actually talk but you get the idea.  

The advance/retard dial does just that, it allows you to adjust the system according so that it doesn't shut off when the bag isn't full yet, or wait until the bag is too full.  It depends upon the typical kind of dirt in your house.  Fine dust will plug the bag faster than course sand, hair etc.  Start out by setting the dial at 3 and vacuum until the system does its thing.  If the bag is stuffed too full, turn the dial to a lower number.  If the bag is virtually empty move the dial to a higher number.  After a couple bag changes you'll arrive at the right setting for the kind of dirt in your house.

I should add that after years and years the little tubes in the automatic system can get plugged and cause the system to not work.  It's a simple matter to open up the lid, carefully remove the little plastic tubes and clean them out.

Ok, another thing....Electrolux introduced the automatic system on the model LX in the early 50's.  On that model there was an additional spring-loaded feature which, when the full bag was reached, it actually ejected the bag right out of the cleaner.  My mother's cousin had that model and I was about 3 years old when I saw the ejection feature in action.  It was more fun than an amusement park ride and I remember pleading "Do it again!"

Yep!  And my early LX still has its key tucked in its little slot.   The later LX was later redesigned with an advance/retard dial located underneath.

The turquoise Gs =are= the earlier models.