This is a 1963 Cadillac tail fin tail light housing, Part # 5954496. This will fit either side, LH or RH, and should fit all 1963 Cadillac’s including Eldorado, but please make sure it is correct for your application before buying it. I have bench tested this and it is in good working condition. The chrome is very nice with only a little minor pitting on the top inside face, you can see this in the pictures. This is a very good used original piece. Sold As Is, and Comes as shown. Please let me know if you would like any other info .