This link is consistent with the 1918 model year.
https://topclassiccarsforsale.com/ford/332790-1918-ford-model-t-touring.html
The brass car era was pretty much over at the end of 1916. The radiator cowling and hood changed to a more rounded top for 1917 & later. The cowls and firewalls are pretty similar on these WWI era cars so a lot of it goes by characteristics in this day and age and it's harder to tell between some years models. Ford put engine numbers on but no frame number till very late in model T production so most dating is related to the engine number. In 1919 the electric starters started to appear which added the need for a large battery and a generator. Fenders and running boards changed over the years. A person has to know the differences in all the parts that were manufactured during the model T era to be able to tell what year they may have come from. This is why overall characteristics are important to getting a Model T completely original for any particular year model. A person may need more information that what photographs will tell you. The guys on the MTFCA forum likely have more answers than I ever could.