
Hello and welcome. Thanks for taking the time and trouble to post your images directly and they expand very nicely too.
However, the background is rather interfering with being able to see the glass itself properly - could we ask you to take them again, using a bit of plain white paper as the background (or a white sheet- just something absolutely plain and big enough), and to help bring up the marks, if you rub a little talcum powder over them with your thumb (or flour - but that can clog when wet) or even cocoa powder, to bring the marks up, and photograph them again?
Sorry to cause more trouble, when you've clearly already gone to a lot.
