Perhaps a mod for this forum could move thread to the Classic Stove Forum for more results;
For company history, try the sub-forum for Fisher Stoves in the Classic Forum. At the right top of page there is a search box to insert Timberline that comes up with a few threads mentioning them. (two licensed fabricators of Fisher lost their license when they copied the patented Fisher - Cal being related to the Moore's that were the licencees in PA, who were related to the Fishers......... this hurt Bob more than the other copiers and his license was revoked) They are mentioned numerous times in the Fisher Stove Story available to read on Hearth as well. Click on attachment tab for pdf here;
https://www.hearth.com/talk/wiki/bob-fisher/
They went on to build Timberline. I don't think they used a numbering system.
Do you need a manual for code compliance?
I was on the other side of the fence
. Here is Cal and wife Joyce;
http://www.mazeministry.com/mormonism/testimonies/caljoycerixon.htm
To be the same as a Mama Bear, it would be deep and narrow having one door. I think you mean a Grandma ??