Mild steel, pebble, brass, lacquered copper wire, and leather

Papier-mâché, stainless steel, sterling silver, fine silver, balsa wood, and graphite

9k gold, stainless steel, fine silver wire, and papier-mâché

Stainless steel, papier-mâché, lacquer, graphite, 23k gold leaf, and silver

Monel, sterling silver, and 18k gold

Stainless steel, papier-mâché, and 18k gold

Sterling silver and Monel