BRAND, You know that I appreciate you much. What surprise me to you it is you apply the modern coins errors and varieties to the recent coins.
Let see how was:
Period 1: Classic coins : End penny in 909, Quarters in 1932 and etc. I can give all the years.
Period 2: Modern coins which all end in mid 1999
Period 3: Recent coins.
So each period are characteristic by the ways the coins, the planchets was done. From August 1999 new presses (horisontal), CNC use for designs, new technology of clading and plating, new ways to produce the rolls of planchets, and I can enumerate more.
Now, the plating and the cladding fall in the same category of cover an surface with other material (science is clear on this - metalurgical compedium) Starting with this we can see that if plating has blisters, also cladding has. On the recent coins, is no difference on the design because the CNC follow an patern with no deviations. Till now the Mint never adjust the Design. What will be in the future we will see.
Conclusion: Those
DDR's or
DDO's on VV I doubt to be legitim for this period. On sigle squeeze? same as Double squeese? We must be really bornet on old thinking to commute.
Sorry my friend, I want to share this with you for your studies. I am not the only one thinking as I short describe.