Here's my 15. Note the shape of the exposed radiator and how the hood follows it. The cowl has a flat front. The hood rests on a hood former attached to the flat surface. A 1916 is the same except that it has black headlight rims, not brass. In 1917 and later years the radiator was enclosed in a steel radiator shell with rounded corners. The hood tapered wider toward the cowl, which matched the hood with no flat surface in front. There was a wood firewall inside the cowl.