Kind of fuzzy but here is a photo of my first O scale two rail MEC F unit. By mid 80’s I had acquired this (actually an A-A unit) that originally was All Nation with Open frame double motors and a remarkable drive mechanism! The photo was taken on the roof of the apartment building we lived in in Woodhaven NY. The roof was my painting station for many Model Railroad adventures. That is forest park in front of the building behind loco. Non windy days were best for painting up on the roof! The building is still there, the engine(s) sold immediately at one of the O scale meets at the Marlboro High school.
now I have the new Atlas MTH two rail DCS/DCC/DC/AC loco that is a computer of sorts. The former (pictured) All Nation was so easy to use!
CPF3, I found all I needed from surplus box diving in the eighties. It was fun putting parts together, painting and decaling finishing etc.. Then running them! My F3’s all had vents and portholes etc.
Mike, I looked high I looked low and could not fin my Franks roundhouse Green MEC.
but the photo of it I took back in the day is here! Lol. It sits on that narrow switching apartment layout! I may have a photo of that layout too!