I have a 1931 Buick straight 8 cylinder 7 seater car.I am very confused about what series it could be.I would request if anybody could tell me what series it could be and how many cars were produced.I am interested in buying a pair of original headlights and any original part available can be looked into.Any type of information is highly appreciated and can be mailed at karant@gmail.com Thanks. All the best Karan