Rochester 4 jet carburetor part number 7024054. It it appears to be new, but I can't say for sure. I'm no carburetor expert, but doing some research it appears to be from the early 50's. It is very heavy (weighs over 13 pounds) and I think it is made of brass. (Also helping identifying the year) "54" is marked on so I'm guessing it's for that year of GM vehicle. Please see pictures for condition. Thanks for looking.