Interesting card, for sure and a tough front/back combination. I just looked and out of ~250 Walsh's graded by SGC there are only 2 Old Mills. I thought mine was the only one in SGC's pop report, but now there is a 2nd and it is a 30 -- perhaps that is the card under discussion. An image of mine is attached.
Regarding the comment about a weak border around the image, note that mine is missing a good chunk of the frame on the right side. Perhaps things got worse as they printed the OMs (and ran out of black ink
) Maybe I better run upstairs and see if I can squint enough to make my back blue, too!