The data plate says “Manufactured for Heat Controller”; Model # GHJ 95 - D3; Serial CN3D104 F1581 7753.
It’s a two burner – I’ll try to attach a photo.
It has what appears to be/have been a furnace “closet” which is now part of the return air ducting.
House is over 60 yrs old, rural mid-America.
I have till Wed 18th PM to complete the report, but the sooner the better.