I believe that during the 1950's Harley only placed VIN on the engine cases. During that time period, I believe that there were no frame numbers - though today like you, I wish that there were from a collector's point of view. It my undestanding that the VIN was found on the left side of the engine case only indicating the year and model of the motorcycle - that's it. Based on my experience of writing appraisals for motorcycles, when you get into the vintage area - documentation can be hard to find. So, most folks rely on confirming that the overall set up the bike is correct and they intensively search for any indication that the frame has been modified or change therefore, rendering it has not the true frame for that time period. I recommend that you reach out to Harley Heritage or one of the musuems there are only a couple around (Harley Based) that may be able to provide you some insight or at least an explaination on how you can verify a frame of a bike for a given model and time period. If you find out - I would love to hear about it.
About $500??
depends on model and condition
The motorcycle Harley Davidson, an American classic, produced the R series in the 1930's until the 1950's. The Harley Davidson RL45 was produced only from 1932-1936.
The revolution engine is a liquid cooled v-twin displacing approx 1250cc, developed by Porsche in an attempt to drag Harley-Davidson kicking and screaming out of the 1950's.
Robyn Davidson was born on 1950-09-06.
Vic Davidson was born on 1950-11-08.
Max Davidson died on 1950-09-04.
Rod Davidson was born on March 15, 1950, in USA.
It was an 2000 series XLCH. For non-motorcycle people that's a Harley Davidson SportsterActually it was a modern Softail Springer with a Sportster tank and add on parts to make it look vintage(the "kickstart" was connected to the frame):http://www.autoblog.com/2008/04/30/harley-Davidson-gets-into-product-placement-in-new-Indiana-Jones/Late model/new Harley Springer Softtail with aftermarket handlebars. Rear seat either custom or Royal Enfield. Aftermarket kickstart kits for big EVO's are available, which appeared functional in the movie, but special exhaust pipes are needed to route around it. New/late model Harley Sportster gas tank with 1950's original tank badges.
Harley H. Christy died on 1950-06-04.
Ian Davidson - Scottish politician - was born on 1950-09-08.
John Frame - sculptor - was born in 1950.