This is an NOS 12V Motorcraft voltage regulator in the original Ford, Motorcraft box, Ford part # D4TZ 10316-A and Motorcraft part # GR-341-B.  This heavy duty regulator was used on Ford, Lincoln and Mercury vehicles including DeTomaso Panteras, Mustangs,Torinos and Ford trucks beginning in 1964. This regulator was NOT used with electronic ignition. It’s an assembly line original which was never installed and has original factory case markings.  Perfect for replacing a worn or defective voltage regulator on an original show quality vehicle.  We charge actual shipping only and are always glad to combine shipping on several auctions or you would be welcome to pick them up. Please see my other auctions and eBay Store for more Ford, Thunderbird, Lincoln, Mercury and Pantera parts and literature. Thanks!