What is the correct engine for BACHMANN SPECTRUM 6 HEAVYWEIGHT PRR PASS Cars

[uwilley]

Recently acquires a set of BACHMANN SPECTRUM 6 HEAVYWEIGHT PRR PASSENGER CARS...What is the correct engine to purchase to complete this train???
Modeling late 1950's early 1960s

[Len]

It depends on what time period you're modeling.

Len

[uwilley]

It depends on what time period you're modeling.

Len

Late 50s , early 60s

[the Bach-man]

Dear Le
You can use a K-4s steam loco, a GG-1 electric, an E-7, or first-generation diesels from us or other manufacturers.
Have fun!
the Bach-man