Ok. I've seen mention of the limited amount of O Scale 2 rail Rivarossi AHM Plastic locos that were made in the 60's and 70's. I recently procured a dilemma locomotive. It's a 2-8-8-0 N1-sd for the Reading #1827.
It's definitely Rivarossi for AHM. It needs some repair in the front end broken step in the front and some of the cylinder tubing is missing.
I'm trying to locate somewhere to figure out It's beginnings