My perspective: I think the kickback hubs were produced from '64-'69. The chain guard is of an earlier style. The "mag" chainring is a red herring...I believe it is a Huffy ring, not a Schwinn, and was swapped out a long time ago. The hub could be a kickback, or it might just be finned.
The more I ponder it, the more convinced I become that this is a 1950s bike with "modern" amenities added to it. A little older than we've been expecting. It might be MUCH older. Consider that the '52 Black Phantom was a springer-equipped cantilever bike with full chrome fenders. Closer inspection is needed.