Unknown partial wheel/roller from bedroom closet doors

A quick learner from Appleton, WI says:
Just bought a 1950's house and bedroom closet doors will NOT slide/roll/close correctly. Found this partial wheel/roller in the track and I'm thinking it is the clue to getting the doors working again. Any idea what this is from or what I need? Thought it looked like a 3/16" Offset Closet Door Hanger, 7/8" Wheels
Product Code: 23-087. Wheel measures 7/16"(width)
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Thumbnail of the uploaded file named IMG_0369.jpg
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Casey from SWISCO responded:

Hello,

We'd be happy to look into this for you but we would need to see photos of the roller housing removed from the door to determine if the 23-087 would be the best match. Thank you. 

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