Baseball Hof Silver Triple Mint Mark

Would MD, as we understand it, even be possible considering the fact that the working dies are convex (hammer/obverse die) and concave (anvil/reverse die) shaped?
More so, it would seem that if it did occur, it would have to be a much less frequent occurance than on the typical flat working dies due to the more stable stationary "bowl shaped" reverse anvil die that leaves very little, if any bouncing room.
This is purely my opinion based on the limited information that I have learned about the minting process. So I'm just throwing this out there to see if anyone knows how these particular coins were minted.

I found a very informative 2014 Coin World online article detailing the complex striking procedure of this coin. You can read it here:

http://www.coinworld.com/news/us-co...ge-for.html#


It contains all the technical data (and then some) needed for you to form your own hypothesis as to what might have caused such obvious tripling as seen on the UNC example I posted in this topic.

It's an interesting read to say the least!