Hard to tell for sure but it appears to me that the letters are a bit thin from the die being dressed out with an abrasive such as aluminum oxide. This naturally increases the space between characters a bit.
To illustrate, here are two 1959 Lincoln cents with differences in the spacing between the AME (and other areas not shown) on the reverse.
The top image is from a relatively early die state (EDS) while the image below it is from a very heavily abraded die. Coins submitted by Robert Wilharm of TX in April 2006.

To illustrate, here are two 1959 Lincoln cents with differences in the spacing between the AME (and other areas not shown) on the reverse.
The top image is from a relatively early die state (EDS) while the image below it is from a very heavily abraded die. Coins submitted by Robert Wilharm of TX in April 2006.

Edited by koinpro
05/07/2015 2:50 pm
05/07/2015 2:50 pm
























