Sparks-Withington Co. 420 A.C. Get a print! $8.00 Add to Cart Product Information: Model:420 A.C. Manufacturer:Sparks-Withington Co. (Sparton) Schematic Pages Page 1 Page 2 Page 3 Page 4 Please note: we carry a wide range of products which will fulfill the specifications above. Please use our search function or browse our products to find what you need!