Thanks for the pictures, Fred, very useful. I see yours was put together with plain iron bolts as well.
I noted a number of differences right off the bat...
1. The pivoting part of the mount on yours looks like it fits correctly (width-wise)
2. The design of the pivoting part is quite different from mine. Mine is more like a Channel Master design.
3. The centre disk on yours has a hole in it for FD verification. Mine does not. I don't think this one is a made up job, the square holes are there to receive the carriage bolts that hold it in place. I would imagine these have to be stamped out, I don't have a drill bit that will make square holes.
4. The struts on yours attach to the rims through the bottom edge like both my CM dishes (imagine the panel vertical), these here attach at 90 deg to that and show no sign of ever being drilled for an alternate arrangement.
Edit:
5. The ring has only 4 attachment flanges, the double wide where the two panels slide in side by side. The single wide flanges at the 45 deg angles present on the CM are missing on this ring. Fred's Winegard has the same arrangement as the CM.
However - your pics clearly show that the half inch struts are right!
I'm thinking with the mismatched parts on the mount, the wrong bolt size holding the mount together, the wrong number of spacers to keep the pivot part centred, the wobbly half inch struts, the lnb cover totally gone in some slight breeze sometime, the lack of the plastic cover over the feedhorn, this must have been a most unreliable dish in operation. I see the post cap is designed for a 3.5" post too, the caps for CM I have seen are designed for 4.5" post.
Does anyone recognize the lnbf? It has "Precision" marked on the outside but apart from that there is nothing to indicate its capabilities. It is totally unlike other C-Band lnbfs I have seen.
Colin