Re: Zeiss zeilsechs
Ewen - just re-read your OP.
I'm going to say you have the Short Side Rail - only question is which version. Not that it matters that much as the principle of operation is the same for each version....they only differ in the number of screws holding the thing in place!
The last iteration, the v3 had two pins and three screws tapped into the left side of the receiver wall, these screws also had locking screws, plus there was a screw down lever on the top of the mount and.....don't you just love these Germans......a locking lever at the side.
This is the best pic I have at the moment...sorry it shows the wrong side but at least you can see the side lever and the top lock
However, despite all the belt and braces designed to lock and keep the thing in place (which didn't really achieve the objective - mine is clamped down so hard using a molegrip, that wild horses won't move it....so much for QD!!)......the only inbuilt windage adjustment are the screw either side of the rear post on the mount itself (the big one in the pic abce)
If you are missing any of the list of screws above....you have an earlier version SSR. Which one will depend on which bits you have.
Pic shows Zielvier/SSR combo fitted to my byf41. Zielsechs at top is in process of being mounted in an LSR to a byf43