Regarding whether it is a "1937" or "1938", some vehicles in some stated got titled as to the date they were first registered, NOT the "model year". So if this is a 1938 model sold in December 1937 it could have been titled as a 1937.
I once had a very interesting troubleshooting issue with a guy in North Dakota who could not get parts we sold to fit his "1934" pickup. After a bunch of phone calls and photos (and some research on his part) it turned out he had a 1931 Model A pickup which had been used as a utility/demo by the dealer (with dealer plates) and was not actually sold for the first time in 1934... And dutifully had a 1934 title.