[Ron Ramirez]

My question is can you cross reference the serial number in order to determine the model number?

We could - if we had access to Philco's factory data on their serial numbers and if they even kept such records (one would think they would, but who knows?).

The fact of the matter is, we do not have this access.

I only know of one possible place where these records might still exist - and that would be the Ford Historical Archives. I want to go there someday and research the archives, but as of now I neither have the time nor the $$$$ to go spend a week or more in Dearborn.

Maybe these archives can tell exactly how many of each version of the 511 Series were built, how many of each version of Model 90 Baby Grands were built, and the brand of toilet paper used by Larry Gubb. Maybe not. Were such records even kept and/or preserved? That is a question I cannot answer at the present time.