Here is a nice specimen of Isotelus gigas from the world famous Walcott-Rust Quarry of New York. This is a complete trilobite with just 1 crack in the middle and super skin quality. It is a well articulated and with minimum restorations.The bug shows fine details  and nice pores  on the body -  This is a nice trilobites sample of  Isotelus gigas trilobite from the iconic Walcott-Rust Quarry. This is one of of the most historic trilobite collecting localities in USA. It was discovered by paleontologist Charles Doolittle Walcott along with William Rust back in 1870.
 
Isotelus gigas (Dekay, 1824)
Middle Ordovician
Rust Formation, Trenton group
Walcott - Rust Quarry
Trenton Falls, New York, U.S.A.
 
you can check the preparation here on photos