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 3,6,12. 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 300 pieces</strong><br><br>COMES WITH Oversized limited edition Panerai lock-box measuring 9 3/4 inches square. Special Panerai Key for opening box.