They are Stern classic generation 1 flipper assemblies. They can be replaced with complete generation 2 assemblies. Just reuse the Wico flipper coil.
http://www.pinwiki.com/wiki/index.php?title=Wico#Flipper_Problems
https://www.pinballlife.com/full-flipper-assembly-for-classic-stern-machines-031980-to-021982.html