You will need to do a lot better with your picture. Try to get the mark in focus. Remember that a small in-focus image is much better than a huge out-of-focus blur.
Actually I have found it, by shrinking your picture and changing the contrast. It’s Frank W Smith Silver Co of Gardner, Mass.
I have two Miller silver mark books and searched the internet but couldn’t find it. Is this something a “newbie” should find or is this mark obscure? I prefer figuring this stuff out on my own.