Vipper, do the service manuals note any changes to the main plate for the hair spring protector?
Some history to ponder:
marcello pisani comments (though untouched is subjective)
Notice this one does not have hair spring guard pin slot in the main plate:
Diego M. posted a 665,XXX 1005 with a 1560 with butterfly rotor. Notice it does not have hair spring guard pin slot
Another one see Tomvox1 posts
Another with various confusion lol