Most things are already mentioned.I would say: the mainblade is original from Victorinox, the rest not. The mainblade seems to be the only part that is inox steel. Victorinox did not produce such knives, at least I dont know of any. The knife seems to be much older that the mainblade. It could have happened that way: mainblade got broken on the 1930s, the owner brought it to a knifemaker, who repaired the knife as good as he could and used spareparts that were available. That was very normal those days. The owner of the knife was happy, he had his loved knife back with an upgraded inox steel mainblade.
This knife is too beautiful! Is this also a blade exchange product? What is the reason for the blade swap? At that time, Vic also made knives by hand. Could it be customized according to customers' requirements?
I think these two knives are not "blade swap product". We have no Elsener catalogs from 1910s-1930s period and they can made this model that time. Of course we need more these knives to be sure.(Image removed from quote.)
The shape of your knife is different. Victorinox produced 2 lines of s-shaped knives, the Nr 1230 serie and the Nr 1240 series, 79 mm and 84 mm. The one shown from an auction is a nr 1239 or nr 1249.
Those pictures are from a project I m working on. Release hopefully soon.