Matt had access to Cadillacs archived invoices for their cars. While Maurice Hendry also sought to get accurate information, My vote would go for the information that Matt wrung out of Cadillacs archives. I dont think that Hendry ever got near them. At the time that Hendry was writing his book, you had to know just who, in Cadillac, to contact for that information. That was how I got copies of the invoices for most of my cars, and for a few others back then.
A friend and I were talking about Oldsmobile just today. I have a 41 Olds convertible phaeton, and Oldsmobiles records show (in one place) that 119 of them were built. Somewhere else in their records, they show 119 sold in CONUS, and 6 exported. The body number on mine is 124.