OMG, once again "cast".... We are long over 1st of April!
The rough silver bars for sure have been cast, prior to the stamping process, therefore any bubbles can be included.
exactly, at the begining there have to be silver bar for pressing, and only way to get it is casting, then rolling to necessary thickness. And sure there is possible small pore from air bubble.
There are less original rings than you think, much less...
