I have a CD 151HG150 that I happened to notice has ghost embossing - nearly complete of the "PATd MAY 2nd 1893" line where the "MAY" is squarely on the lower wire ridge, centered above HGCo. The rest of the line is somewhat arc'd on each side. I can't seem to get a decent picture to show you. If you blow up this picture, you can faintly see the "A". It is much clearer when you hold it in your hands. So, my questions:
1. Have you ever seen something like this? 2. How can I photograph it - if the effort is worth it?