I agree that I'd like to have hope for the cradle part, not that that would make all THAT much difference, especially since it has been changed beyond recognition if it was original.
The two images of the mount are almost identical in angle (not exact) so the comparison is pretty close IMO.
I based the scale on the only consistent area. The upper rings. Size and spacing. They match and I believe they are original.
Forgetting the lower section from the thumbscrew down for a moment there are similarities if you squint.
The general shape is similar.
Tool-marks and "witness" marks could be similar due to the same type milling operations so it is hard to be 100% sure either way.
The PS mount cradle is actually shorter up and down on the ends and tapered rather than straight. This "could be" from filing off rusted material from the original OR simply remade a bit different.
The lower ears:
The RIGHT ear is close to the hero in general shape. The tool gouge to the left is similar but not exact.
The LEFT ear seems wider than the HERO to my eye. Could be lighting but... (wish we had a sharper HERO image.)
There is a "wave" like pattern between the rings on the HERO. Could have been filed off due to rust.
The screw holes are an issue IMO. The PS threads are larger and more defined. Could have been re-tapped due to rust.
Overall the PS mount is taller. The center Square hole is longer.
The verticals on the PS are more abrupt and have a step where it connects to the cradle.
The section below the cradle does not line up with the upper as on the HERO. Could be the angle, but the rings line up perfectly so...
The entire surface is re-worked. It looks nice but if it was the HERO mount it has been altered by the restoration so much it may as well be new.
There should have been photos taken of the mount before and during the restoration which would have provided proof that the original HERO mount was under there.
For my money, IF Tony wanted a million for this prop he should have maintained as much of the original as possible and documented the restoration to confirm. And even tho the HERO mount was "complicated" Duplicating the original form is job one in a restoration. The fact that they decided to NOT duplicate the dovetail mount suggests to me that the rest of it is new as well. The rear shapes have issues as well but "could be" explained if it was reworked and reshaped.
The question is, exactly where could he or would he have cut off the old and added new? What could have been salvaged? Seems to me that if the dovetail was "mangled" the thinner verticals would have been rusted away as well. So at the bottom of the cradle? The "hollow" under the center is not there. There is a gouge, likely from a mill, but no hollow.
Did Karl cut off the cradle, smooth it all by hand and weld on a new lower section and verticals? Maybe. Very hard to tell but it would require a lot of secondary shaping.
If they didn't want to recreate the dovetail area because it was too complicated and too much work... then cutting off areas, cleaning them, making matching parts to weld to and rework to look like ne piece seems like MORE work than just machining a new part.
Karl could confirm all these question.