Powered by a self-winding caliber, the northern hemisphere rotates counter-clockwise while the south operates clockwise. A scale of the 24 time zones circles both, with day and night both visible through contrasting colors. To increase readability in the penumbra, the longitude reference meridians have a white line treated with Super-LumiNova, reflective of the continents. The second time zone is displayed at 9 o'clock, while the date, corresponding with local time, appears at 3 o'clock. The display is complete with a bidirectional, bronze fluted bezel with ceramic inserts of engraved cardinal points. A luminescent beige index and Arabic numerals, domed cathedral needles, a railway timer, and a bronze box all add to this unique watche's vintage style. This limited edition has 1,858 pieces, which corresponds perfectly with the year the Minerva factory was developed.