This is a vintage COLEMAN Model #502 liquid fuel single burner camp stove. This one is dated 1975. This is a popular stove, since it is fairly small and doesn't take up a lot of space. This unit is in really nice clean condition and shows very little use. My guess would be that it was lit once and just put away all these years. Fuel tank is holding pressure, so it is good to go.
Camping season is underway, so get outfitted now.