@ kiehlr, I don't know how to post an image but I have a picture of an original oil filter that's painted black on the block and then ink stamped. I can post it if someone tells me how or email to you. Also, if you have a Mustang Monthly from February 1988, on pg 18 the first image on the top left shows a filter that was painted on the block and then stamped; again I don't mind scanning and then posting the image or emailing it to you.