I had a tou gh ti me putting a year identification on this beauty. I've gone with 1976, though there is an outside chance she's a 1975. In 1976, Cadillac and Lincoln were the only two luxury cars in the US. In 1977, Cadillac moved to lighter, shorter and narrower de Villes, so this is really a classic.
Now there's some Dee-troit iron in this Caddy. I found her parked at Chet & Emil's in Birnamwood, Shawno County. The driver needs binoculars to see the front of his car!