Bridges personalised by Panerai - Ctes de Genve decoration. Mono-metallic Glucydur balance with Nivarox spring. Incabloc shock protection. 'Swan neck' regulator. <strong>Limited edition of 1,000 pieces</strong>. Arabic numerals and luminous baton hour markers, 'BLACK SEAL' inscription at 12  underneath Radiomir inscription. Black Seal 'Torpedo' Craft Logo at 6.<br><br>The ceramic used is Zirconium Oxide and it is molded from powder using a process of isostatic pressure (instead of being cast, as is the normal practice). In this way all the positive features of this material are enhanced: its extreme durability (up to five times greater than 316L steel), its strong resistance to a wide range of temperatures, and the fact that when worn for long periods the watch does not become scratched, damaged or corroded.<br><br>Also, ceramic formed in this way takes on a more homogeneous appearance than that resulting from the which is the traditional method of casting the material.