Movement decorated with Ctes de Genve. Blued screws. Glucydur balance wheel, Incabloc anti-shock device, 'swan neck' index with micrometer screw adjustment. <br><br>Baton hour and minute hands. Large arabic numerals at 3,6,9,12. Sandwich dial is composed of two juxtaposed plates. The top plate is perforated allowing the lower plate's Superluminova coating to show through, providing maximum legibility. This coating was formerly Radiomir - a zinc sulphide, radium bromide and mesothorium composite - from which the watch derives part of its name.<br><br><strong>Limited to 1938 pieces. EXTREMELY RARE AND VALUABLE PIECE.</strong><br><br>COMES WITH ORIGINAL PANERAI INTERNATIONAL WARRANTY, Parchment Certificate indicating limited series production, Special Extra Large Panerai Box 9 3/4 inches Square, The Hardcover 75-page book 'Legendary Watches' by Giampiero Negretti, sponsored by Panerai, Engraved Radiomir and SPECIAL EDITION Base Plates attached to inner box lining.