Love the vacuum!
It's Not unusual for TTI vacuums that are produced in such large quantities not to have serial numbers. typically there's just a date code which I saw on the video.
I might suggest that you get a tripod mount it would greatly improve the video quality.
Thank you both! I’m glad that Hoover decided to make this vacuum for as long as they did. I fear that the end of production for the one remaining Guardsman is just around the corner...