Need help IDing '67 Radio Parts

[Sacbill]

Need some help identifying parts. I was going through some parts the PO of my '67 left for me, and I found a bag of radio mounting parts. (See pic below.) The radio knobs are real (marked with C7ZZ p/n), but everything else looks like it's from the replacement radio he put in.

• I will probably keep the pigtail (even though the daggone thing was cut short).
• The black bracket to the left looked and felt somewhat original. Does it look familiar to anyone?
• There's that one "half trim ring" that's a pretty hefty piece of metal (the other trim rings are plastic). Familiar?
• The rest of the hardware looks pretty generic. Anyone see anything in there that looks unique and would have some value?

 

[johnpro]

The nobs and half trim ring thingy could possibly be original, but I don't know. The bracket looks after market to me, and other than the plug, the rest is just hardware store crap that is not even related, necessarily to cars, let alone Mustangs.

 

[66gt350]

The two nuts and washers look like they are from an aftermarket radio to hold it in place. The lower nut looks like some sort of nut to hold on a piece of trim.