
First Diesel Switchers
Union Pacific D.S.1000
model: EMC NW2
built: 10/1939, EMC demonstrator #889
The story of UP's early EMD switchers can be found on
Don Strack’s
Union Pacific Switchers and Slugs Page

Photo Credit: Charlers Trapani Jr., Gary Stuebben Collection
History:
Souther Pacific 1000
model: EMC SW1
built: 2/1939, EMC demonstrator #804

Photo Credit: Otto Perry

Holly Sugar SW1, ex Sp 1000
Photo Credit: Robert Jacox
additional info link: Rob Jacox's Western Rails
AT&SF 2300
model: ALCO HH600
built: 5/1934, ALCO demonstrator #1
additional info link: ATSF All-Time Diesel Roster

Photo Credit: Bill Navari Collection
Western Pacific 501
model: EMC SW1
built: 1939, EMC demonstrator #906
additional info link: Western Pacific SW1

Photo Credit: Merrill Thurman
Portola Railroad Museum, Portola, CA
History: