The best way to determine an old Roco Atlas is the frame. It has a
fuel tank with a slot in the middle.
See the Atlas[Roco] parts diagram.
HO GP-38/40 Loco A-Roco / HO GP-38/40 Loco B-Roco
It was also marketed by ConCor. Now discontinued. No diagram but more
I have a Western Pacific GP40 in HO that I bought second hand and was
wondering if anybody can scan the parts list for this model please.
I have been to the Atlas site parts pages but the parts list there is
GP38/40 and appears not to be of the same model I have. I assume the
they offer is the lesser detailed GP40 "classic" model . I believe
the Atlas "Master" series.