Hi all,
The reason for not updating these illustrations is probably caused by the fact that they are engraved plates, expensive to replace.
These identical illustrations show up on a number of (then cheap) German publications but were overhauled at some point. I have a fold-out instruction form that shows the same 1900-model, but has revised coil-spring illustrations also.
Also note the lack of a stock-lug on all illustrations.
Apologies for the bad image, it's a framed reproduction that sits above my PC
