Ooh Christine, we're in a right muddle here. Don't worry about it at all, it will get sorted.
Please, give each single piece of glass its own thread. That way we know what we're talking about. It can get confusing if more than one piece is illustrated.
Please, use a plain background for your photos. It makes it much easier to try to work out what we are looking at. You know what it looks like before you point the camera - we don't. You really need to try to show the item as clearly as possible. Glass is three dimensional, photos are only 2.
You have started a new thread for your other photos (using a button at the top) rather than replying to yourself (using the reply button under your last post).
I'll ask a moderator to help sort it out for you.
In answer to your query about marks, in more recent years they've been mostly done away with in favour of sticky labels, which are much cheaper. Marking glass is a skill that requires time and labour, it is probably reserved for Ltd Edn and one-offs now.