Sterling Mfg. Co. B-4 Get a print! $8.00 Add to Cart Product Information: Model:B-4 Manufacturer:Sterling Mfg. Co. Schematic Pages Page 1 Schematics Content Page 1: Model B-3 Receiver Schematic Model B-4 Receiver Schematic Model C 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!