Would be questioned and would not be what I would choose if I was looking for one since they were not stamped at Dearborn but typically for that plant and year at Cleveland so you have to consider loading, shipping, unloading at Dearborn, inventorying and such. Shortest example I have from Dearborn in 1969 is twelve days
In a related comment there are some times two dates that can be a month of so apart also.
Hope this helps