Purchased some time ago as a "refurbished" unit for a backup for my 72 Skylark. Never installed but it has been bench tested. Perfect replacement for your faulty unit or easy way to add a less common option to your old car. Simple install and period correct, not the newer replacements that have two wires. 

Please inspect photos as they are the actual item you are bidding on. Check out my other items and ask about combined shipping.