This is an incredible double sided trilobite fossil from Morocco.  The trilobites are selenopeltis, Ordouvician Period from Risani, Morocco.  There are 10 trilobites on one side and 8 on the other with 3 star fish.  These fossils are 500 million years old and the plate sits on a custom metal stand.  The fossil plate measures 31 x 23'' and the stand's base is 24 1/4 x 10''.