Madrat,
What you have is an SV2S, the SV1S was produced in small numbers and the majority were converted to 2S spec on rebuild. Your vehicle looks quite original with the exception of the rear locker work, there are a few hard to find items on the vehicle including windscreen, engine sides and original seat frames.
Is she a runner? we (brother, father and I) are currently doing a ground up on a 42 SV2S and are going to have to give the engine more attention than we would have liked as it has low oil pressure when hot. I think for us the frustration when we started was that the rust just wouldnt go, so the decison to strip, blast and paint everything was taken.
Looking forward to seeing progress