Thats it Ged! Such a nice knife and I miss mine. Will start the search now I know what its called.
I thought I recognized your description.
Actually the wife now tells me that she thinks its full name was the "Picnic Lock". Apparently they also did one like it but without the lock. The big flat screwdriver blade also locks, when you press it against something it moves back in the scales against a spring to lock.
For some reason the newer Wenger ones, whilst having same features and size, are just not as nice looking to me with the sculpted handle and all that.
Thanks a lot anyway, will start looking for a 2nd hand one.
I agree about the looks but I wouldn't necessarily give up on the newer ones. SWMBO bought me a Vic Soldier for Christmas and I'm getting on really well with it. The soft, sculpted scales are quite a bit different to handle. It really isn't the tough nut that you'd expect from the name, you couldn't easily take the tracks off a tank with it, but I think it's a great bit of kit. I have large hands so the bigger size suits me well and I think whoever designed it must have been left handed like me, I really like the way it's set up. At the moment I mostly use it for cutting up mountains of cling-film wrapping on pallets of stuff at work and for that job it's the tool I've been waiting years for. It isn't great for splitting kindling though, which is a bit of a disappointment. It has a liner lock which isn't my favourite. One other thing I like is having a cross-point screwdriver instead of a corkscrew.
We have a couple of the other larger ones in places like (oddly enough) the picnic basket in the back of the car. I think they're better for food prep than the smaller models.