VINTAGE FIRESTONE AIR CHIEF 4-A-21 TUBE RADIO FOR REPAIR. PLUGGED in and got a hum, missing front button assembly, see pictures. Final sale, needs work, as-is, priced to sell. The item “VINTAGE FIRESTONE AIR CHIEF 4-A-21 TUBE RADIO FOR REPAIR” is in sale since Saturday, March 24, 2018. This item is in the category “Collectibles\Radio, Phonograph, TV, Phone\Radios\Tube Radios\1930-49″. The seller is “atlas-outlet” and is located in Pittsburgh, Pennsylvania. This item can be shipped to United States, Canada.