The record I pulled it from doesn't list the D171 at all actually, but it does list something called D-174. I have never heard of such a thing, but have seen multiple confirmed D171 cleaners. I agree I think something is off with the numbers.. thatis not a 1934 design.
I recently picked up this Royal model 43 from Luke’s mini meet. It has a metal brushroll and no real way to change the belt other than hand strength. Also, only a stretchy white rubber belt will work, not a normal royal belt.
Anyone have any info? I’m kinda thinking prototype given how...
There was also the ZC89, which looks like the 90 but has one rear button on the back and no cord winder. These were made in UK and in Mexico for the Mexican market. Also seen some Luxes branded as Kenmore south of the border...
I have a couple weird ones I'll show soon. The cleaner you have marked as a red z55 is a Godfrey's rebuild Aussie only z40. Originally sold in the same skin as a UK 55.
I've been to Jimmy's shop twice. Both times I left with more than I went for and he was nice and accommodating. If you are willing to spend some time looking through the stuff and are within a day's trip of it, I would say it is absolutely worth it.