Firstly, the series 90 for Cadillac went through 1940.
Secondlish, if it serves as any help, both my 38-9039 and 39-9057B had licnse weights shown as 5455 Lbs.. I fully unerstand that these figures are not true weights of the cars, but perhaps could give an idea of their weight.
A Yugo, they were not.