I have a few of those myself including but not limited to that nice Electrolux Olympia in background. Great machine, well built.
I have my Dual Sanitronic 50 in the works of re polishing and soon to come when I get time and parts, a Dual Sanitronic 80 I will keep in green but use older style fork handle & a spare lighted Kirby logo light hood of a 2nd D50 project. I will use a newer Kirby zipper bag for a HAPA bag conversion using a polished out Heritage Mini EmpTor.
Here's a pic of 3 regular use faves;
2011 Kirby G10D Sentria (latest version), 1965 Kirby Dual Sanitronic 50 & 1993 Kirby G4D w/ early G10 upgrades including "F" style bag top using cloth HEPA bags
Before & after pics of the 512. Only had the motor unit, handle, and bag when I got it, didn't even know if it would run. But it polished up nice, and runs as good as it looks!
Jeff
The bag on my 517 is not original. It is an aftermarket replacement that takes Eureka F & G paper bags. There is another thread on here that has 3 of them with original bags. They would be gray with Kirby in red in a circle. Wish I had one for my 517.
Jeff