Not the biggest deal, but just wondering if anyone might recognize this frame.. Done a lot of digging but I cant seem to come up with a matching visual... and im not sure about the serial, from what I can see the serial is just a 'B' on the bottom of the bottom bracket, Ive referenced other types of serials but without any other digits im just guessing, lots of paint on it, I cant see any number impressions anywhere near the B. And to my knowledge there are no other markings that I can see, I was guessing 1942ish because of the style of tack welds on the inside of the frame - Ideas? Thanx