I was studying my combined Undecorated Athearn SW1000 and SW1500 instruction sheet and discovered the following "handrail info". I do not have the current releases so I am showing all. It does not differentiate between 1000 and 1500. This covers handrails only not carbodies, however....
Handrail Sets:
Black with yellow and white, BN Green, BNSF Green, Mopac Blue, RI Maroon, WP Green, CSX Blue YN3, SP Grey, UP Grey, CSX Grey, SPSF Yellow, GN Blue, L&N Grey, MKT Green, Conrail Blue, Reading Green, Reading Yellow, RF&P Blue, Frisco Orange.
It does not differentiate what is 1000 or 1500, you are on your own to speculate. RDG had only the 1500's. The RDG SW1001 are similar but different from SW1000. Reading Green and Yellow units had green stanctions and yellow railing, Reading all Green 2763 had all yellow railing and stanctions. Hmmm.
Chris
I forgot to list white and MKT Red as two others. Chris