What an interesting box. It may be a vintage cooler but I can't find any that seem to have as large a lid. So I thought maybe I could find some information about the original build, or the original owner, or some pictures from a car show, but no luck so far. The seller's phone number is listed with a Rhode Island car dealership A&T Auto Sales. Andy's House of Customs doesn't exist although Andy's East Coast Speed is a DBA for Andersen Automotive at 321 S Main St in Providence so maybe they were involved in the original build?
After much looking, I am wondering if it's not a vintage freezer or a reproduction of one, laid on its side?