Actually it is not a weak strike. The dies were polished down so much that the devices were made smaller because of the removal of the fields, shortening the height of the devices. They probably figured the could remove the last of the clash lines, without taking off Abe's face:

A polisher down there really worked hard trying to get rid of clash lines. Looks like he worked a few more years there.


A polisher down there really worked hard trying to get rid of clash lines. Looks like he worked a few more years there.



























