Indo China Piastres....little help!

Hi all. I possibly have a chance to pick up a grouping of these from a friend but have no idea about them. I'm sure the type was faked on some level, but there are multiple years represented and they seem like they have luster in the pictures that He gave me. Of course one in the pictures looks oddly corroded. My questions are what are your thoughts on real or fake? What type of value might they have? It seems like they are fairly valuable on ebay. Thanks for any help you can give!!
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They look fake to me! They also didn't make them in 1823 if I'm seeing the picture of the 1st one correctly!
I'm with amwldcoin.
https://www.pcgs.com/SetRegistry/collectors-showcase/world-coins/one-coin-per-year-1600-2017/2422