I have no clue - just found this website:
NEW LOWERED - Starting and Buy it NOW PRICE ...THE HOLY GRAIL...You are bidding on a VERY RARE LOT of Three CHECKS - Two (2) Shelby American Inc. checks HAND SIGNED on the front side - One by Phi
www.worthpoint.com
There it's stated that G. T. Midgley was an employee in the accounting departments of the Shelby companies.
???