Walthers Proto 920-40733 HO Scale EMD SD7 Pennsylvania PRR 8588 with DCC/QSI Sound - USED CTRN 54"(90mm) - 4

54"(90mm) - 4

and zero mess

style Jerry cans and 3 types of markings

4-pole 2400 Kv

Every gear in the SCX10™ III is metal

Walthers Proto 920-40733 HO Scale EMD SD7 Pennsylvania PRR 8588 with DCC/QSI Sound - USED CTRN 54"(90mm) - 4Walthers Proto 920 40733 HO Scale EMD SD7 Pennsylvania PRR 8588 with DCC QSI Sound USED Originally intended for use on branch lines, EMD introduced its Special Duty series in 1952 with the SD7. This loco also introduced the three axle Flexi Coil truck with its powered center axle. This was a major departure from earlier three axle designs where an unpowered center axle was used to spread the engine's weight over more wheels, reducing the strain on the