Found this in the work for chapter 3. Pretty cool.
Just to complicate things, I've got a G98 Amberg 1917 EWB with original Lange sight and showing no evidence of reworkingt by anybody after 1917 except for the fact that the front sight base is slotted for a hood.
The marking in question is definitely Czech, but does not necessarily denote Czech rework. The S (lion) # markings denoted military districts. I'll have to look up what the 6th district was when I get home. There were numerous variations of the stamp and they changed significantly over time. Most of the very early markings differ significantly from thouse found on later Model 98/22 and VZ.24 rifles. I collected Steyr M95's for about 15 years and this was a very common property marking found on M95's, but it is not surprising to see the marking on a reparations Gew.98. You can occasionally find the marking on Ruby, Steyr, and Rast & Gasser pistols as well.
Jonh Wall?