Yeh, I am afraid you are right about multiple addictions. I USED to be an old car nut, spcifically Ford T's and A's. There are many good books out there that give year to year details, but my time in the hobby was preinternet. One of the good books out there on the model T is "From Here to Obscurity". There is an updated version by the same authors, but I'm not sure of the title. I think the title of a good model A book is "Henry's Lady". I used to have a book with the color chips for model A's. It and other books on the subject that could provide you with answers are available from Obsolete Ford Parts in Oklahoma City. Haven't checked for a web site. Other possible sources are the MTFCA (Model T Ford Club of Am.) and the MAFCA (Model A Ford Club of Am.) FWIW if you are talking Model T built between 1915 and 1925 the answer is easy: black or black or black, or with the option of black.