Wow, this sight has lots of info!! New here due to just finding this bike in the attic of a garage. Its been there a LONG time!! The tires have pretty much became solid and are flaking off of the rim. Heres what I do know about the bike. Its badged a Cadillac which as I understand was made by Shelby. The serial number is V820937. The rear hub is marked New Departure Model D and the brake is marked New Departure. Looks like not much is known on the serial numbers so I started researching the hub and brake. From what I can tell by the brake it should be a 1940-1941??? Looking for some info from the experts on what year this bike may have been made? Any help would be great!! .