I am saying the follower is replaced due to the font change and the waffenampt stamp. I could be wrong on all of this, and if so, it is more important to showcase these examples as variations of original manufacture.
The Gustloff portion of the reference section is kind of spartan compared to the Mauser. For example, there was a question on an old K98k stock someone was going to use for firewood because he could not identify its origin. It carried a Kohler bayonet mount just like on the 1940 337 you photographed (which should also be in the reference section as there is no 1940 example). All the other metal matched accepted manufacturer code and WaA stamps for Gustloff. Because of the nose piece, it did not match what was accepted as the norm, which should have been an Astrawerke. That stock may be firewood now. So it is important that these variations be shown as original and not bubba fabrications. If these are not included in the reference section, at some point the pictures could be lost due to a site overhaul.