The blanker tubes went every few yrs. It may be why the G-2's are high.
TNR shield often missing or hanging loose in Magys. Tuners were constantly dirty
& messy techs just tossed them. Maggy even tried tuner pads, no joy. Dont
remember who built them but they were in other sets & didnt have problems.
Go figure
Part you found looks like its part of a coil form with the slug.
Look on the CONV panel.
73 Zeno
LFOD !