I picked up this heater the other day and it has no marking for me to identify it.
It was with a bunch of tractor stuff but this looks aftermarket to me because the core looks like it's factory fresh.
The chrome pieces look older but nice and shiny, the back parts in flat look like they are a fresh paint job, the shiny black front looks like new powder coating and the grey fins look like they were sand blasted as they are bare with no paint or clear coat. The fin section rotates to direct the heat.