Looking at the finish on your various parts, it seems pretty clear that they are not all original to the bike. As such, identifying and/or dating the bike by the parts is a questionable approach. Furthermore, the presence of the reverse dropouts does not necessarily indicate a track bike as they were commonly used when bikes were all single speeds. I think you have a single speed bike that somebody cobbled together with a collection of parts to resemble a track bike (the adjustable stem and bars being the most obvious). I happen to have that same stem but in a finish that better matches the rest of the bike.