History of GP50 Question

Anyone have more info on the GP50? What is the difference between the early version and the gp50II?

Just curious, I know Athearn produced both at one time or maybe still does.

Thanks,

Mark

The Phase II had the laundry chute blower duct. AT&SF and BN had the only Phase IIs.

Phase I GP50’s had a rounded blower duct and Phase II’s had the angled style.

Also, the phase II’s have a toilet hatch on the nose
Ch