Right, the paint (and decals) are pretty new and the frame is quite old. I've never seen those lugs before, but that doesn't mean much. Still, I'm sure this frame is at least 50 years old.
And yes, the paint is terribly crude. But the brazing looks pretty crude too; look at the second photo, you could get your finger nail under the top downtube lug.
Is that an aluminum cottered crank?
I think more than 60 and the fact it survived means someone thought it worth keeping. But you're right, the workmanship is sloppy. In this photo you can see where the crossbar ends:
The crank does look like alloy but I'm not sure what it is.