[Joe from MO]

Originally Posted by Dave Noreen

They are the mark of Charles August, the Ithaca employee who proved the barrels. It appears from my observations that the practice started about the time they dropped the cocking indicators on the NIDs in the 459xxx range. Here are some other employee marks.

Alvin Burgess --

Thanks, that makes sense, since my 1927 NID does not have the marks, but my 1938 gun does...