The pearl eye on the TEDESKA cartridge has no function. It serves as a pure adornment like the one on the frog of a violin bow. But if you insist on having a function, I would quote an old lesson from the lutherie school "Place your right thumb on the frog, it will not be long before a melody sounds"
There are moments where you must make a choice, though not always a good choice, for various reasons. Here are the prototypes that no more exist with us.
TEDESKA BERLIN GERMANY