From the marks, it also appears that both tubes were 11mm X 60R and @ some point the left tube was sleeved, etc.
Yes, you can see fragments of the original 11mm left tube marking. The caliber numbers "5.4 / 35" are over-stamped when the barrel was later sleeved.
How did you determine original wood?what year was the barreled action made? At some point it was altered to the existing calibers I am very surprised the gun is original.it would be fun to shoot
I have several European rifles and doubles and in my opinion wood and metal appear to be original. I'm not sure of year of mfg. I don't recognize a typical proof house date stamp. Other than the numbers shown in the pictures above, ( number 62687 is the serial number, on the bottom of the left barrel flat, numbers 933 / 1643 are on the bottom of the right barrel flat ) there is the number "1341" on the bottom of the original 11x60 right barrel. No doubt, the 22 Hornet sleeve was later added, and the "5.4 / 35" was stamped over the original 11mm caliber stamp. As can be seen in the breech photo, the sleeve and extractor work was very professionally done.