I think Linden is one of the most well-known gunsmiths of the period. there were many period articles written about him which are quite useful today.

He passed away in 1946 which predates the E.C Herkner company scope mount (1947) and the Pecar scope (1953). From my understanding of Linden rifles that does appear to be his stock work but I don't make any claim of being an expert on it.

https://imgur.com/a/jx73SEb
I have a couple of period articles about him archived and I will upload more when I get the time.