Welcome Remco,
Wow - Looks like that knife has seen a bit of damp or oxidisation, or is it just paint

I am no expert but a few comments: - If it was a Victorinox
I think the corkscrew would be grooved, - or maybe that came (and went!!) later
The blade does not look like the right shape (thinner) - Could be sharpening
The can-opener awlso looks thinner than a Vic.
Awlso the bottom of the awl looks more rounded than a Vic
SO it could be a knife from another company of a similar design - eg from Solingen
Which might support the switch of the cs and awl positions
Can you get to the tang stamps - ie clean it up around the base of the blade?

That would be the best way to find something out
As I am sure you know that style of opener disappeared around 1950 from the so called "Officer's Knives'
But hung around on the Soldiers until 1960