Hi Dude, we'll just have to lassoo you off that pony - before it disappears down that mountain gully near Spokane...well, close by....
Anyway, as our Michel says, fad of the '70s. Mind you, if it was fitted correctly, and on the P6 Rovers (1972-1976) it was, it could in fact be quite attractive. I used to have a sliding Webasto Sunroof on a Rover 3500S. It was a lovely option, and it did kind of give you open air motoring. The roof had a far bigger opening that the steels on the 116. Incidentally, the steel roofs on the 116s did in fact originate from Great Britain - made by, who else, but Webasto. Regards Styria