I have one like that, definitely not model a ford clock. It's almost twice the size of the original one in my 28.....
I guess if its old it fits an A or a T! Lmao
So educate me a little, what is a header clock? My car has a clock in the rear view mirror that hasn't worked in over 50 years but I hate to mess with it and I'm not really worried about it working anyways but why is it called a header clock?