2.25" Rare Rhinoferus Trilobite - Putilovo Quarry, Russia

This is a very rare Rhinoferus kolenkoi (Schmidt, 1898) trilobite from the Putilovo Quarry in the St. Petersburg region, Russia. In fact I've only seen one other example of this species for sale. It's 2.25" in length, only has a slight arch to it and is 3d. The preparation is quite nice. Like basically all the ordovician trilobites from the region there is some shell restoration. This restoration is spread out in small spots on the tail of left side of the thorax where shell was flaked during collection.