Color? is it glass or graphite? I am pretty sure they had started making graphite by then. a picture would be great. Especially of the grip/reelseat and the area above the reelseat, and then the ferrule (where the two sections meet).

In glass, it would be an FF805, FF806, FL96-6 It is odd that it has a sticker (that would preclude the FL96-6) but no model number.

That does seem a little odd. My FF786 has the Fenwick/Woodstream logo on a sticker with the “S” serial number; that’s only place the Fenwick name appears, but it does have the model designation, weight, etc., as usual further up the blank.
Have you tried it with a 6 wt line? I’ve never fished an FF806, but most of my Fenwicks are marked as 6wts, and that’s mostly how I fish them, but I sometimes use 5 wt lines, and it wouldn’t surprise me if many find that as a match.

If you're following Admin's instructions for using the FFR photoserver, it won't upload if your file size is too big.
You need to reduce the image resolution, which you can do by opening your photo in, e.g., Windows Paint, and Resize to about 1000 pixels wide, and best to save with a new name.