This is an NOS ball bearing distributor breaker plate in the original Ford box, Ford part # B7A 12151-A.  This distributor plate was used in 1957 thru 1959 Fords, Mercurys, Thunderbirds, Lincolns and Ford trucks with a V8 engine which used the ball bearing breaker plate.  This breaker plate was factory wrapped and has no rust or corrosion.  Perfect for replacing a missing, rusted, frozen of damaged breaker plate. See my eBay auctions and my eBay Store for more Ford, Thunderbird, Lincoln, Mercury parts including the NOS 1949-1956 Ford distributor caps and NOS 1949-1974 Motorcraft 6 cylinder distributor cap.   We charge actual shipping only, are glad to combine shipping on several items or your welcome to stop by our shop and pick it up. Thanks!