Gene, In my book i have the last ser. # for 1945 Racine plant as 4517367 and the last ser. # for the RI plant as 4510245
In 1942 they all started at 4600001
ther is no ser # for either year in the 45250xx range.
Do you have something differant from this that I can look at.
My book "Full Steam ahead" Copr right 1993.