The Gresso Avantgarde Skeleton is inspired by Skeleton watches where the movement is exposed directly by a clear dial and a clear back allowing one to look straight through the watch. The Gresso Avantgarde Skeleton follows the same principal and allows one to peer through a sapphire crystal display at the circuitry within. The phone is made of a ceramic coated titanium alloy with aircraft grade stainless steel keys making it completely scratch proof. Only fifteen of the Gresso Avantgarde Skeleton phones will be made making them extremely exclusive.