The following tables illustrate the various spotting features of EMD GP7 and GP9 units purchased by the Pennsylvania Railroad. The basis for these tables are from a Jim Williams presentation at the May 2000 annual meeting of the Pennsylvania Railroad Technical & Historical Society.

EMD GP-7 vs. GP-9

  GP-7 GP-9
Build Dates October 1949 - May 1954 January 1954 - December 1959
Horsepower 1500 1750
Louvers at Rear of Car Body 2 Full Rows 1 Single Louver
Louvers on Battery Box 3 Single Louvers 1 Louver

PRR EMD GP-7

ENGINE NUMBERS PRR CLASS DYNAMIC BRAKE DUAL CAB CONTROL STEAM GENERATOR COMM COOLING FANS CARBODY CUT OUTS BUILD DATES HO MODELS
8797-8806
(10)
ES15m No No No Trainphone 4-36"
1 1/52 Atlas* (8800, 8806);
Life Like Proto* (8797, 8799);
Bachmann* (8803, 8805)
8500-8501
(2)
ES15ms No No Yes Trainphone 4-36" 4 8/52  
8502
(1)
ES15m No No No - 4-36" 4 8/52  
8503-8508
(6)
ES15m Yes No No Trainphone 4-36" 4 8/52 Atlas* (8508);
Life Like Proto* (8508)
8509-8512
(4)
ES15m No No No - 4-36" 4 8/52  
8545-8546
(2)
ES15m No No No Trainphone 4-36" 4 8-9/53  
8547-8549
(3)
ES15m No No No Radio 4-36" 4 8-9/53 Athearn Genesis (8547-49)
8550
(1)
ES15m No No No - 4-36" 4 8-9/53 Athearn Genesis (8550)
8551-8552
(2)
ES15ms No Yes Yes Trainphone 4-36" 4 9/53  
8553
(1)
ES15ms No No Yes Trainphone 4-36" 4 9/53  
8554-8582
(29)
ES15m Yes No No Trainphone 4-36" 4 8-9/53 Life Like Proto* (8579, 8580);
Key Imports (brass; 8562)
8583-8587
(5)
ES15ms No No Yes - 4-36" 4 8-9/53  
Assigned to Passenger Helper Service:
8797-8806 (10) ES15m No      Trainphone     /51  Walthers Proto (8798, 8799, 8801, 8805)

* Model lacks trainphone per prototype.

PRR EMD GP-9

ENGINE NUMBERS PRR CLASS DYNAMIC BRAKE DUAL CAB CONTROL STEAM GENERATOR COMM COOLING FANS CARBODY CUT OUTS BUILD DATES HO MODELS

7000-7049
(50)

EFS17m Yes No No Trainphone 4-36" 4 10-12/55

Athearn Genesis (7024, 7046)
Life Like Proto* (7001, 7010, 7015, 7020);
Bachmann* (7048)

7050-7104
(55)
EFS17m Yes No No Trainphone 4-36" 4 10-11/56 Bachmann* (7085)
7105-7144
(45)
EFS17m Yes No No Trainphone 4-36" - 5-6/57 Athearn Genesis (7117, 7138)
Athearn Genesis* (7109, 7138, 7140)
7145-7204
(70)
EFS17m Yes No No - 2-48" - 10-12/58 Athearn Genesis (7154, 7184, 7203);
Life Like Proto (7160)
7175B-7204B
(30)
EFS17m Yes No No - 2-48" - 10-12/58 Athearn Genesis (7178B, 7197B)
7205-7269
(65)
EFS17m Yes No No - 2-48" - 10-12/59  
7230B-7239B
(10)
EFS17m Yes No No - 2-48" - 10-12/59  

* Model lacks trainphone per prototype.