Hi- I have a small collection of old time photographs. They are on some type of onion skin paper and are backed with some type of manila paper.They are of famous people, places, things. Somehow I became aware of the name “Steglitz” when I researched for information on these items. The interesting thing which is why I think they have value is that the photos bled through to the backing paper and the backing paper has a watermark embedded in it that is dated 1865. Can anyone tell me what I might have and if they have any exceptional value. Thanks, Bob