I got an H0 218 and an E 410 from my grandpa. Can you convert them to digital encoders?
If they are original Fleischmann models it can be done, but their construction makes it a little bit more difficult as they use the chassis as a common return. On some old motors you need to replace the front cover with a modern one as well to be able to convert them. If they are Lima it's relatively easy to convert them.