“Bumps-a-daisy..”
As these motors appear to have been shielded, I assume they are “explosion-proof” motors that would be used for applications connected to fuel supply? As already suggested by one forum member.
If this is the case I have had a search on the net and discovered that the Mustang had electric “Fuel Booster Pumps” mounted in the top of the wing fuel tanks – could it be one of those? It would explain why they seem to be common finds.
However I cannot find any decent photos of a Mustang unit to compare – surely someone on here has worked on these things and can help please? I do want to get that display caption correct!