From the shape of the windows, and the rear vestibule,
I guess they started with a streetcar and seriously modernized ?? it.
Found some more info ... Seems there were two of them.
This is the appearance of No.101 when entering service,
before 'streamlining' ...
" Rail motor car No.101 at Cripple Creek, Colo., August 13, 1936.
This was formerly a trolley car belonging to the Colorado Springs & Interurban Ry.,
but was rebuilt for service on the Midland Terminal, between
Colorado Springs and Cripple Creek, Colo., slightly more then 55 miles,
with two automobile engines.
One engine is connected by a shaft, to each of the trucks,
and they can be operated separately, or together "