Highway 61
Revisited
The very good point is that the S3, contrary to the postwar Contax bodies, will accept all of your vintage 35mm Zeiss lenses using the external bayonet system BUT anything having the "prewar" design (even if immediate postwar manufactured) will leave circular scratches all over the chrome finish of the S3 front plate.A few years ago when I was actively collecting cameras I liked to buy clean but cheap Zeiss Contax and Kiev collectibles, this range of cameras always fascinated me. I ended up with a lot of Sonnars but a few 35mm as well: postwar Jena Biogon (2! I did not even remember I had 2), Orthometar, Planar and an Orion 28. I never seriously used them because I was never at ease with the squinty RF and the external VF, both having the habit of scratching my glasses.
The solution is either to cleanly file down the rear surface of the lenses bayonets and chrome rings to remove a layer of material of about 1mm, which can be done with no regrets with, say, a Jupiter-12 or even an Orion 28, but you will for sure think twice about it with collectible Zeiss lenses like a Jena T Biogon or an Orthometar.
So my advice would be that you use the postwar 35mm Planar with the Nikon S3, et voilà. 😉
PS : a thin felt ring over the Contax II eyepiece will protect your glasses ; and take notice that the Nikon S3 eyepiece is made of metal too, so you may think of either fitting some felt at it as well or switching to genuine mineral prescription glasses, which won't get scratched by something made of soft metal. 😉