Looking forward to your complete analysis. Also, I'd like to see an article on @JCro57's Nickel in Coin World.
I'm anxious to know the results, and I hope that you can post photos along with your descriptions. Chris
While I cannot be absolutely certain, the preponderance of the evidence now leans toward a tandem strike clip. Write-up is in progress.
My article is now available in the online edition of Coin World (print edition to be mailed in a few days).