Any truely original bank wrapped roll of silver dollars is likely to be mixed with both Peace and Morgan dollars as well as to be made up of mostly circulated coins. I don't doubt that there may be a handful of bankwrapped rolls of silver dollars floating around in somebodies drawer somewhere dating from the 1960s, but any bank wrapped roll is likely to be made of circulated coins, since thats what the banks received from the public to make such rolls. I have seen bank wrapped rolls of Ike dollars, they were deposited at a bank where I was a teller 10 years ago from a customer who got them at a las vegas casino in the 1970s.
The phrase "Bag Marks, bagged etc" comes from the fact that Morgans were kept in bags and clashed together to make the infamous bag marks on the coins. Those bag marks can make a high grade mint coin into a lessor grade coins.