It's marked "A Coleman Division" and "Fairport, N.Y. USA" The SN is 678021922
BTW, Birchwood Casey Alumablack followed by Minwax Paste Wax does a pretty good job on the missing paint. The chipped edges are still there, but at least the voids are black instead of gray.
Great little gun! Ideal for plinking at peanuts and marshmallows tossed onto a pond. (No lead in the pond. Owner's rule.)
I think we're all Bozos on this bus.
...that much I know. Manufacturing date range is 1972-1977.
I recently scored two 454s, one of each Phase. The Phase II has lighter colored grips and a little ramp ground into the frame to make the BBs a bit easier to load. The Phase I has a screw head/coin slot to tighten the CO2, while the Phase II has on of those thumb tabs. My assumption is that the Phase II is a later model.