GE's demonstrator #8835 of 1923
http://sbiii.com/boxjfcpx/jcageir2/8835a.jpg
An USA-Trains 44t-driveline and chassis and an USA-Trains / Charles Ro boxcar are used for this project
Rock Island's #10000 - a two-power switcher similar to NYC's DES3
http://digital.denverlibrary.org/cdm/singleitem/collection/p15330coll22/id/45533/rec/1
An USA-Tains NW2-chassis and an USA-Trains refrigerator car are used for this project