Hello all thank you for your comments
The mystery engines are just that still yes I've asked Jim no identification.
These are Factory built and finished as the other ones that have surfaced have similar finish too consistent for individual kit building by others .
The mystery engines are on the small side here's a photo with your standard Adams & Son E unit which is close to 17/64 scale and a Bay Shore Alco DL109....as comparisons .
Someday an ad or a flyer will surface for these odd Little Engines till then they'll remain a mystery.