Mantua gp20

[Xrperry]

I found this near the bottom of a box of rolling stock I have, been there so long I don’t remember where I got it. Any idea how old it is?

 

[santafewillie]

It was manufactured after 1978 and before 2002. Here are a couple of links that might help you date it more closely.
https://ho-scaletrains.com/tyco-emd-gp-20/
https://ho-scaletrains.com/mantua/

 

[Xrperry]

Thanks santafewillie

 

[Xrperry]

I set up a oval test track and it runs real smooth and quiet, question is how long