[Dave in MD]

Welcome to the barn and being a Special Coupe owner. As others have said it is a Special Coupe that Ford made from July 10th 1928 to July of 1929. It replaced the Standard Coupe during that time period. The telltale sign is the recessed area behind the quarter window that takes a molding to separate the the sheet metal form the top material. This molding is a two piece steel molding. The Specials also have a two piece steel belt rail molding that goes from the rear of the door on one side across the back to the rear of the door on the other side. The belt rail moldings were used on the 1928.9 Special. Sport and Business Coupes. Engine number A1620XXX would have been stamped on May 23rd or 24th 1929 at the Rouge plant
I have a 1928 Special Coupe and if you have any additional questions, please don't hesitate to ask.
Regards,
Dave