This is a used vacuum advance distributor with OE/OEM part number 1112950 that fits 75-79 Pontiac 350, 400, and 455 engines. Has date code 4L12. The distributor was working many years ago when it was removed. 

The three prong wire connection that goes to the distributor cap is missing one of the connector tabs. Buyer pays $7.50 shipping. Thanks for bidding!