[Jacques Reed]

"There is a metal strip above the inside of the rear window opening, which has two small metal hooks. I haven't looked closely at this, but guess it was some way of securing a canvas cover, in a rolled up position?!?!"

Hi Tony,

This is the curtain that attaches to that metal strip.
Top of the photo is the bottom of the curtain. There is a pocket on the bottom of the curtain in which a metal strip fits into it.
The bottom of the photo is where it ripped off that bar above the rear window opening. The canvas is sandwiched between the two metal strips on that upper bar.

My good wife sewed me up a replica of it many years ago and I think I still have the drawing with the dimensions if anyone wants it. It may have been done before by someone else however.

Cheers,