Never heard of a heated windscreen in MK3 Escort/Orion series.

MK4 was first Escort/Orion that had one I believe, also bronze tinting was something typically mk3. MK4 was all green, maybe Orion Ghia had bronze tinting.

The MK4 windscreen heating looked different though, is without the elements in the picture so much. Maybe this was a special series by an aftermarket windscreen manufacturer.
Eg the tinted MK3 windscreen originally had no blue/green band at the top, but you can still buy them.

Cheers