Lithuanian K98k
I see your point that the Konigsburg Depot Lithuanian "Columns of Gediminas" and "C"were applied to the barrel without reference as to whether they would be visible when finally spun into place.
That said, the strike is fresh and the edges are raised so again in my opinion this was done as part of the Kg rework.
The next question is, if these marks were Kg depot marks, why were they used at all, if they were not necessarily made to be seen.?
Perhaps there was a financial trail. Perhaps Nazi Lithuania somehow paid to have these rifles reworked for their SS Division or their SS Police units and thus it is more an accountability mark.?
Lithuania in 1940 was about 3 million people. Stalin's occupation was a brutal affair. The Nazi occupation was not much better. Below is a brief history: World War 2 in Lithuania (1940-1944):
"The cruelties of the June 1940 Soviet occupation, led to a widespread despise of the regime in less than a year.
When Nazi Germany declared war on the Soviet Union in June 1941, the Lithuanians staged a June Revolt and managed to liberate most of their country.
However, the German armies came in and while Germany did not immediately abolish the provisional government, they rendered it powerless.
The Nazi occupation brought a relief from the Soviet persecutions but it had its own target: the Jews. The number of Jews living in Lithuania declined by ~88%.
By 1944 the Germans were losing the war and the Soviets re-occupied Lithuania. Knowing what to expect many Lithuanians fled with the retreating Germans.
Lithuania lost ~8% of its pre-WW2 inhabitants due to Nazi actions and ~32% due to Soviet actions, some 40% in total (1,15 million out of 3 million). "
I doubt there was any manufacturing of K98k barrels in Nazi occupied Lithuanian. Again, I believe it is more likely that these barrels were made or finished from blanks at Kg.