I really should ask your permission to repeat your photos. Hope you don't mind. I brightened up your first photo, and with your permission, will share. All in all, a really nice model. I am beginning to think the frame is Lobaugh 4-4-0 with an extra axle slot. A photo from underneath might verify that.
Edit - I found the underneath shot in your first set of photos. Definitely Lobaugh style. I will enhance it and be ready to post. I note that on the big computer these photos look way better than on the iPad without brightening or enhancing.
Also - took a quick look for a prototype. Not Reading, and not in the Cyclopediae that I have. I will check LeMassena's book this evening, and Erie, if I can find my moldy copy.