The rings are small to begin with, and the flaws even smaller yet. On top of that, imperfections were easily covered up by the burnishing process. Only a collector looking at these SSTK's 80 years later with a loop, would it become obvious to. To Gahr, and certainly the recipient, it was a non-factor to go in and fix the irregularities with in the mould. That rune which Gaspar speaks is loaded with the most flaws of any of the other panels. There are probably 10 flaws on it alone, that can be viewed to different degrees according to how the liquid silver flowed into the mould and were picked up by each ring that was made.