This a very rare special edition set from 2019.
The Blackwing 811 is a tribute to libraries and the hope they represent. It features an emerald gradient finish and gold ferrule inspired by the iconic green lamps that light the halls of libraries around the world. Each pencil is coated with a special phosphorescent topcoat, so it can be a literal light in the dark. The model number 811 is a reference to the American poetry section of the Dewey Decimal System that contains the works of countless inspirational writers.