My research shows this NOS 945559 window regulator is the left front window regulator for 1939-40 Dodge, DeSoto and Chrysler and 1942-48 Plymouth 2 door coupe and convertible cars.  Very rare to find window regulators for these early 2 door cars.

My research also shows part number 945559 is the same as part numbers 790419 and 944729

Please look carefully at the picture and do your research to determine if this part meets your needs. I guarantee the part number but not the application nor superceded part numbers. Please email if you have questions or need additional information. Thanks for looking.