Thanks for responding, Troy.
What color were your stripes?

I searched the archives and Google itself, no mention of them on Mopars.
All the photos of top-notch Mopar driveshaft restorations don't show or refer to them.
This shaft also lacks the lengthwise weld that some restored ones show, but it's definitely a Mopar shaft.
(No idea why there'd be a lengthwise weld anyway)