Radio block off plate 68-72 Nova

[92646]

I have seen a couple of different styles of radio delete plates on the 1968 thru 1972 Novas recently. I remember I used to get them up north from wrecking yards for 1968 thru 1970 Novas that looked like the 1969 Camaro radio delete plates. PG&E used to buy fleets of these cars for their meeter readers and they were strippers with no radios. But now I have seen several cars with no provisions for a radio at all and Nova in raised letters across that area. Is there a right one for all Novas or could it have been different based off of some option if the dealer was going to install the radio? Mark Sheppard