May 1958 Model Railroader and Burlington Route Historical Society Bulletin #36 featured photos of Mr. Corbin's models. #36 also had a nice biography.
I recall seeing both of his T2 2-6-6-2's (1 Elesco, 1 Worthington FWH's) plus his T3 2-8-8-2 at the Chicago O Scale Meet about 10 years ago. Two fellow BRHS members and myself were scrutinizing the models carefully, and one said to me "Are you going to buy one?" I replied that they were not "state of the builders art, so I would pass". In retrospect, what a goof I was! Carey, you have a wonderful model of a most unique prototype. They lasted a long time in service in the Black Hills of SD. They were initially replaced by 4 unit F3's, then SD7's/9's, and lasted until 1950.
If it is not a state secret, how did this model find it's way to you?