To confirm what is in Jim's book,check the 1935-1941 Packard Parts Book Gr.30.401. This section gives the part numbers for the friction type vent windows,(same as 110&120)used on all early 160 conv. sedans (1377) and conv. coupe (1379). The car in question also has the correct door panel design that was used on all early cars. I have info. on 22 cars the highest # 1377-2173.............