Hmmm... forks and chainring look Huffy, as do the frame's lines and headset hardware. Not an AMF, Murray, HP Snyder (maker of Rollfast/Hawthorn) or any other bike I can come up with, but that is a very unusual Huffy ser#. Any Huffy built bike I know of early 60's thru 80's usually always have a letter in the ser#. Maybe makers of Rollfast ran out of their own in house production frames and had to buy bikes from a manufacturer who allready makes bikes badged for Western Flyer, Hiawatha and some J.C> Higgins/Sears, to rebadge as their own. This happened a few times back then, where you may see a bike badged and dressed up as a Monark, but actually being a Huffy made frame (like a Lexus badge on a Fiat)