The dropouts are usually a giveaway. Rear track ends do look crimped and bolted; front is just crimped, no dropouts. This indicates a very cheap frame. How heavy is it? Just judging by the photos, it looks like the typical mass-produced gas-pipe frames of the 40's, especially with the bulky lugs, so I wouldn't get any hopes up. Chainring was made for 1" pitch block chain, so its current chain is obviously an update, or the crankset was an upgrade. An actual track bike from the 30's would have been drilled for a front brake, if it had a brake at all for road use, not a rear. Cheap replacement fork and repaint? Possibly, except that the crimped rear track ends are consistent with the crimped fork ends. With those crimped ends, this was definitely not a bike used in 6-days; not strong enough.

Luis