Good morning Owen. Thank you for the picture from the Showroom Catalogue, but the copy that I'm seeing doesn't show a curtain or any of the details you mentioned. I'll try to find that catalog myself and see the image you are telling me about. At least I know there is something out there that will help with my quest. Thank you ! And no, I certainly would not ask you to pull yours apart for any reason . As always you've been extremely helpful and I appreciate it very much.
Best Regards,
TomB

That's a great idea. I'll try to make contact.
Will advise.
TomB

Ahhh yes, of course that would be the case wouldn't it. Or maybe they hooked right to the back of the cab on either side of the window. Hope I find that answer in the direction you've pointed me. Will advise.

No I haven't look in either of those places to be honest.
Nothing in the past that I've browsed through showed the rear window shade so never thought to double check.
I'll get on that right away.
When you say "The vertical cord that controls the bottom rod is terminated below with a small upholstered button" I'm assuming that there are 2 buttons, one on each side of the window. Are they mounted on the rear package tray or on the interior wall of the cabin ? That's probably an answer for tomorrow as well. In the meantime, I'll get started looking where you suggested.
Thanks again for all your time today.
TomB

Yes, that sounds right...I have that "stiffener" rod or stick as I've called it, and attached to each end is a metal end piece that is not flush with the end of the stick but sticks out from the end of the stick enough to let a small cord to be passed through...just as you've mentioned !
...does that (you're right, that cord is elegant)cord attach somewhere at the top of the roller mechanism, passes down the side of the shade and through the metal end-pieces (the eyelets you mentioned)on the bottom rod, and then get attached somewhere to the cabin (or in my case it might be the package tray) and the shade travels up and down on the cord ? In my mind's eye it starts to make more sense that way...What do you think ? Or what do you see ?

Hello Howard, and thank you too for jumping in. As a matter of fact, the end pieces look similar or exact in most cases, but I need to double check. Of course I have no access to the spring unless I try to take it all apart and I'm reluctant to do that right now, but you are right, and I'm up for new mechanisms if they'll work and not show. I guess if worse came to worse, I could glue a chosen fabric on the top roller, insert the bottom stick, attach the curtain-pull and hope no one does to mine what they did to Owen's and that is "pull" on it !
Regards,
Tom

I don't blame you Owen, and I wouldn't want you to put anything in jeopardy that's for sure ! I will most gratefully accept any pictures you can provide !
Thanks again,
TomB

Hello Owen, and thanks for your reply.
I would assume you are right, but most of the stores I've brought the parts to have no idea how to test the mechanism or take it apart to rebuild it. Seems the shades/mechanisms nowadays all come from China and are exchangeable, but not repairable. If it wouldn't be too much to ask, when you have time, would you mind taking a few pictures of your shade, maybe up, down, halfway, and how the cordage is arranged. I may be missing a piece or two and not even know it.
Thanks again,
TomB

I have most, if not all the parts for the mechanism, ie top roller, end caps, bottom/base of shade (basically a wooden stick with metal end pieces), the cordage and even the little wooden shade pull. I don't have the fabric, but most importantly, I don't know how to test it or rebuild it.
Does anyone have a resource for such a thing ?
Thanks,
TomB

Thanks Rusty,
You're probably right. And between you and OD, I have a much better picture of of how the pump was meant to be operated and maintained.
I'm learning !
Best Regards,
Tom