Thank you to everyone who commented on the “Name That Top” photo on the HVA website and the HVA's Facebook page.
The gearbox in the photo belongs to a 1938 Cord 812. Cord was an American automobile company from Connersville, Indiana, manufactured by the Auburn Automobile Company from 1929 through 1932 and again in 1936 and 1937. The Cord Corporation was founded and run by E. L. Cord. Vehicles produced by Cord were noted for their innovative technology and streamlined designs. Eventually the production of the Cord stopped due to reliability problems, including slipping out of gear and vapor lock. Although most new owners loved their sleek fast cars, the dealer base shrank rapidly. Unsold left-over and in-process 1936 810 models were re-numbered and sold as 1937 812 models. In 1937, after producing about 3000 of these cars, Auburn ceased production of the Cord. A single 1938 Cord prototype with some changes to the grille and transmission cover was built. In 1938, the Cord company was sold to the Aviation Corporation.
And the winner of the contest - Melvin Brown from Glendale, AZ!
For guessing correctly Melvin will receive a free HVA ballcap. The same cap is available here, in the online store.