That is cool. I want a Lyman 35 but they just cost too much. I paid dearly for a Lyman 36 for an M-S carbine a few years ago.
I feel the same way, the parts collection that I got had a lot of parts for Lyman 36 sights. I was able to use some of the parts and make whatever additional parts I needed to make sights for a couple of project rifles.
The top action is a 1904 Verguiero action, it combines features of both Mauser and Mannlicher rifles. The bottom action is a Greek Mannlicher action.
Both actions have a split rear bridge and require the aperture to pivot as the action is worked.
Below are closeups of each sight, neither are quite complete, but are close.
