Believe the first 10 prototypes and 1st 5 or 10 production car frames assembled by Midland Ross Cleveland Ohio under contract with Studebaker
Know the prototypes all were Midland Ross and carried green frame plate
When I have some spare time I will check the actual production records. Using a TW ad as a source is a new one on me and is dangerous to even reference because as Abe Lincoln said If its on the Internet it must be true
Regards