Information needed for old furnace

I have an old furnace found in a crawl space of a house built in 1920. I can’t figure out in what year it was made.
It’s a model of Sears, Roebuck & Co. It has a model number: 867 1401 (867 is fixed and 1401 is in the fill-in field). No serial number or any other number.

Would really appreciate your help. Thanks