The above is musonics stylus for the 100 / 200 and 300.
At best it will likely turn them all into the 100 .....
One can assume of the 3 the 300 was the best and likely not too bad if
it has an original 300 stylus in good condition in it. Moving Permalloy
is another name for moving iron = most MM cartridges except AT's.
Suck it and see is likely your only option...