1960s bifold door harware

Question

Trying to identify this bifold door hardware for replacement.  Some parts on the door had "NLCO" stamped on the back, these parts only said "PAT. PEND." on the back.

Bob · Accepted Answer

Thanks for posting. See the 23-141 Closet Door Roller and its opposite-handed version, the 23-142. This looks very similar to yours, but compare and see what you think.

Dimensions for 23-141

Alternate view of 23-141