[drc]

The genuine T200s are paper thin, and glossy on the image side and rough/matte on the back. This is a good help in determining if one you have in hand is an original. The originals actual photos on old time photo paper.

And, as noted, since the are real photos (not lithos or other printing press prints) they won't have a dot pattern in them-- front or back. Any T200 with a dot pattern, especially on the image side, in a reprint.

Lastly, the originals often have an aging effect called 'silvering.' If you look at the front surface and at different sharp angles to light, a silver patina may appear in parts, especially the dark areas-- getting darker and lighter and disappearing as you change the angle. This is an aging effect on antique photos and is strong evidence of old age. Won't appear on a reprint. You can sometimes even see the silvering in an online image. One thing is if the card was light/underdeveloped this silvering patina might not appear or be much harder to see. So it may not appear on all genuine cards.

For the beginner, though, I think the simplest and quickest thing to look for is the thin paper with glossy on front and matte on back.

All the qualities are the same for the original T222 Fatimas too. The T222s are the same kind of kind of thin 'photo cards.'