There's no reason to think that those aren't Hi-E hubs, but.... there is some weird stuff going on.
On both hubs, there is a large bolt head on the right (drive) side. My hub only has a 5mm hole through the axle, and this bolt looks too large to pass through a 5mm hole.





On the rear hub, the left (non-drive) side has some extra nuts or washers in line with the axle.
I'm starting to wonder if someone modified the hub to allow a shaft larger than 5mm to pass through the axle? The 5mm hole is just part of the "end caps" that fit onto the shaft that passes through the hub and bearing.... at least that's how it looks in the drawings.



It might be fun (or frightening) to pull off the wheels and get a good look at what is going on.

Steve in Peoria