Hello Bob, Thanks for your comments and to answer your questions about this car: (1) the data plate information is: VIN 6273528, Style: 38-6019S, Body: 3495, Trim 40A. When I received the building sheet I received the following hand written note from Matt Larson, co-author of the book: "LaSalle, Cadillac's Companion Car".
"3/6/06 Joseph, very interesting. I have been in the hobby 45 yers and dealing with the records for 15 years - never heard of a 1938 60S with a dividion glass. The record sheet for your car does not show a Special Body Order number and there is no notation about a divider glass or anything else unusual. The usual production summaries also do not list the two 1938 60 Special Convertible Sedans, the 1938 60 Special Coupe, numerous two-tone paint jobs on these cars, etc. I wish I could prove for you that the dividion wass done by Cadillac, but there are no such records. Matt Larson, Cadillac Archivist."
I will try and post a photo of the glass divider which will show that it looks like a GM divider with Bedford Cord upholstry, which matches the rest of the entire. Joe