It shows the ID of each marking (how it was marked in the parts drawings) and a sample of how the marking should look. Main factory markings that were present in production drawings were mandatory for all manufacturers. The image on the right shows an example of such a list.
They are: 1) Main markings that were present in production drawings starting in 1935 (before 1935 they were not mentioned in drawings) 2) Operational markings and proofmarks 3 ) Markings about a specific rifle/carbine configuration (training, sniper, etc.) Now more details about these markings groups. As mentioned in the general information, there are several groups of factory markings.
