The Spyderco C52PBRG Calypso Jr. is a limited-edition folding knife released in 2005. It features a plain edge blade made from premium ZDP-189 stainless steel, renowned for its exceptional hardness and edge retention. The handle is crafted from burgundy fiberglass-reinforced nylon (FRN), offering a lightweight and ergonomic grip. This sprint run consisted of approximately 600 pieces, making it a sought-after item among collectors.