The movement and enlarging towards the rim is just die wear. Also circulation flattening also enlarges the tops of the devices to make it look like it is wider, but it is just flattened. Take a look at the sites to see what to look for on die doubling on those years to see what to look for during your searches.
http://www.varietyvista.com/01b%20L...O%201967.htm
http://www.varietyvista.com/01b%20L...R%201967.htm
Then your eyes will know what to look for on doubled dies for this year.
http://www.varietyvista.com/01b%20L...O%201967.htm
http://www.varietyvista.com/01b%20L...R%201967.htm
Then your eyes will know what to look for on doubled dies for this year.


























