Would Greatly Appreciate Some ID Help with This Frame

[nycet3]

Just picked up this frame. Other than the number stamped near the integrated seat post clamp, there are no visible makers marks that I can see.

The frame is obviously lugged. I can see pins inside the frame tubes where the latter interface with the lugs.

The bottom bracket is threaded. There is a flip top oil cap on the non drive side.

The brake bridge is round and not drilled.

The dropouts are rear facing and have braze on mounts for chain tensioners.

The paint inside the bottom bracket matches the outer finish.

I picked this up near Toronto, Canada.

Thanks,
Joe

 

[SSG]

I think it's 30's or 40's. It could be an American made Hand-built frame? It doesn't look like it was ever even assembled.

 

[nycet3]

Thanks f

I think it's 30's or 40's. It could be an American made Hand-built frame? It doesn't look like it was ever even assembled.

chiming in.
It appears the rear drops have been repaired, so I'm going to say it was built.

There were so many frame builders back then (whenever back then was), this could have built by anyone. That said, the serial number in 20K makes me think otherwise.

Regardless of the make, thinking I'll have the repaired dropouts done more elegantly. Then have it refinished. I sense a burgeoning long-term project...