I've owned the house since 1988 and the closet doors are also from 1988.
The part is a wheel attachment at the base of the door that acts as a roller. As you might see in the picture, the wheel has had wear and tear, and comes off.
Inscriptions: acme 4011 and 4012, US Pat 3,058.173, Pat CAN 1963
I would really appreciate it if you can tell me weather you have this piece or where I can find it.
Thank you for your time
Be Well
