I couldn't find any examples of this on ebay or COMC, hence the reason I asked for images here.
This does not look like something that was done by design, then had the plate remade to remove the element. It looks to be a loose piece of debris that was present during the silver inking phase, a print flaw. If it was a wide-spread issue, I'm sure we would have seen it on COMC and/or ebay.
-- Dan --
Note: Please see my profile for more info regarding trading (section updated 3/4/2024). I have added a large portion of my inventory to the site, and currently have trading turned on (details are in my profile).