Corvalis:
vintage. french bicycle and free parts
One doesn't see Terrots very frequently, old traditional maker of bikes in France many years ago or so, LA license on it from decades ago. Looks like a fun project at not too high of a price. It looks like a cotterless crank, maybe not that old.
I think that is a shadow on the downtube, in ways, it almost looks like a ding or something.