I am trying to get some insights into the Pre-1921 Peters box codes. On the boxes I have seen, in 1921 Peters began punching their box load date codes as combination of letters and numbers. An example would be “4 89 RP” though the order of the letters and number changes.
These codes were apparently used until 1935 when the Remington style codes were adopted.
Prior to 1921 Peters used a stamped code of letters and numbers like “NLRI 3 15569” or “NOEP 211635”. Example:
The box styles would probably be either one of the following:
It looks like Peters introduced the 30 Luger in 1917 and the 9mm Luger in 1919. This means that boxes of either caliber with the stamped codes date from either a 4 year period (30 Luger: 1917-1920) or a 2 year period (9mm Luger: 1919-1920). I have only documented one example, the code on the 30 Luger box is faded to the point that it is unreadable.
Any additional examples of either caliber or box style would be greatly appreciated.