Looks like a Champion 40 or 140 blower in good shape. If you take the gear cover off and clean it with kerosene then re oil it, should last for several more decades. A tip about oiling it. Put in just enough oil (not grease) for the lower gear teeth to run in, the splash oil system will distribute oil throughout the other gears & bearings/bushings. Too much oil and it will leak like a sieve. Don't ya love it when a plan comes together.
PS: I never recommend disassembling those old blowers unless it is absolutely necessary. Why you ask, because there are no new parts available for them and getting them back together in the exact positions is very hard so it usually causes more harm than good.