Original style rear rim for 39-54 Ford tractor.  Came off of a 51 Ford 8N.  Excellent condition for it's age

No rust around valve stem hole

Has some caked rust where center disc mated with rim.  I've chipped off some of it and have found no rust through.

Original fine thread bolts are rust stuck in the rim.  I have applied PB Blaster.  Has original fine thread nuts and washers.  Threads and nuts are in good condition.

I can find no rust through anywhere on the rim.  Would be hard to find one in better condition