They were manufactured by Detroit Radiant Products Detroit, Michigan.
There are 2 sizes.
There are 4 smaller ones that measure 23" X 17" with 2 grate panels.
The model number for the smaller ones is A10-2-CA.
These smaller ones are 60,000 BTU per hour.
There is a photo of the tag included in the photos.
I also have 5 larger ones that are available in another listing with the following details.
The larger ones measure 23" X 23" with 3 grate panels.
The model number is A10-3-CA.
These are 90,000 BTU per hour.
Please see the photos of the tags attached to each model size.
Please visit the other listing to purchase the larger size.
Local pick up in Bay City, Michigan. Will load.