This is a nice, 2,8” long Hollardops trilobite from the Devonian of Morocco. Visible eye facet preservation in both eyes. There is only about 2% shell restoration in total.
 
Trilobites were a very diverse group of extinct marine arthropods. They first appeared in the fossil record in the Early Cambrian (521 million years ago) and went extinct during the Permian mass extinction (250 million years ago.