How To Use the Geosphere As a Compass
The bidirectional ratcheting bezel (60 clicks) on the Geosphere can be used to find and mark the approximate direction during daylight hours.
From sunrise until noon in the Northern Hemisphere: hold the watch horizontally, point the tip of the hour hand at the sun and rotate the compass ring until S (South) is halfway between the hour hand and 12 o'clock. The S on the bezel now points to South. At noon, the hour hand itself should point south. From noon to sunset: Point the tip of the hour hand at the sun and rotate the compass ring until S (South) is halfway between the hour hand and 12:00. In the Southern Hemisphere, hold the watch horizontally and point the 12 o'clock index in the direction of the sun. The north-south line is now halfway between the hour hand and the 12 o'clock index and the bezel can be rotated accordingly. As an alternative, the Montblanc 1858 Pocket Watch Limited Edition (Ref. 118485, limited to 100 pieces) is already equipped with a built-in compass. It is powered by the brand's new manufacture Caliber MB M16.24, a beautifully handcrafted monopusher movement with the iconic V-shaped bridge and Minerva arrow, based on the manual-wind Minerva monopusher chronograph Caliber 17.29. The pocketwatch can be positioned on a table with a stand or combined with a built-in compass that can be accessed by opening it up to lay flat on a map. The back of the compass features an engraving of the four cardinal points, which are enhanced with Super-luminova. The case alone consists of more than 50 elements and can be transformed into a wristwatch, thanks to a custommade brown “Sfumato” aged calfskin strap with two pin buckles and a cover. The 60-mm pocketwatch is made of grade-2 titanium, and the dial is crafted from Dumortierite stone, named after famed French explorer Eugène Dumortier, who discovered it in the Alps mountain chain in 1881. It retails for €48,000 (approx. $56,000).