Lot

Kroenen, a disciple of the resurrected Rasputin (Karel Roden) and one of Hitler’s top assassins, donned his Venetian mask when he killed Hellboy’s (Ron Perlman) adoptive father Trevor Bruttenholm (John Hurt).
Kroenen is a semi-mechanical being with a clockwork heart. Del Toro drew inspiration for his reimagined Kroenen character from his attempted adaptation of Alexandre Dumas’ The Count of Monte Cristo. He also wrote that the intended design for Kroenen and his lair was a blend of 1920s and high-tech, creating an industrial gothic look.
The mask is made predominantly of black resin with a metal “breathing apparatus” around the mouth. An ornate design runs around the edges of the mask, down the forehead, and under the eyes. The mask is held to the head with a pair of rubber straps, which attach around the back with metal buckles. The eyes are made of dark, transparent acrylic, allowing the wearer to see. The breathing apparatus consists of two fan sections either side of where the mouth would be, with a grate on the chin and red wiring on display. The breathing section has been intentionally distressed. The mask has some additional wear from production use and age, including minor scuffing.