| MODEL | Montbalnc 1858 Iced Sea Automatic Date |
| Ident No. | 129370 |
| MOVEMENT | |
| Calibre | MB 24.17 |
| Features | Automatic, self-winding |
| Indications | Hours, Minutes, Calendar aperture, Second in center |
| Complications | Date by disc |
| Battery | – |
| Power reserve | Approx. 38 hrs |
| Frequency/Jewels: | 28,800/h, 26 Jewels-rubies / Flat hairspring |
| CASE | |
| Material | Stainless steel |
| Bezel | Unidirectional rotating blue bezel, in steel-ceramic |
| Sapphire crystal | Domed sapphire crystal with anti-reflective coating |
| Case Back | Stainless steel case with unidirectional bi-colour ceramic bezel |
| Crown | Screwed and fluted in stainless steel with Montblanc emblem in relief |
| Dial | Blue glacier dial with white luminescent Arabic numerals and indexes |
| Hands | White Super-Luminova® hour, minute and second hands |
| Distance between horns/clasp | 20 mm |
| Diameter | 41 mm |
| Height | 12.9 mm |
| Water resistant | 30 bar (300 m) bar |
| STRAP | |
| Material/Colour | Interchangeable and adjustable rubber strap/Blue |
| Clasp/Buckle | Pin buckle-fastening |
Montblanc’s “1858” range reimagines the references developed by storied watchmakers, Minerva, in the early 20th century – the Swiss outfit made its name handcrafting timepieces capable of timing to one-hundredth-of-a-second precision.
The first-ever sports diving watch for Montblanc, the Montblanc 1858 Iced Sea Automatic Date features a glacier pattern dial that gives the impression of looking into the depths of a glacier. This blue glacial pattern dial is inspired by the Mer de Glace – Sea of Ice – the main glacier of the Mont-Blanc Massif. Its texture was achieved using an almost-forgotten ancestral technique called gratté-boisé. The timepiece comes with a unidirectional bi-colour ceramic bezel, an engraved case back, and an interchangeable blue rubber strap with fine adjustment system. The bezel features colour-matching ceramic inserts with white Arabic numerals and markings and a detailed 15-minute scale. The dot marker has Super-LumiNova with a blue glow. The timepiece conforms to the ISO 6425 norm for diving watches and is water-resistant to 300 metres.
The Montblanc 1858 Iced Sea with automatic date is available in three different dial colours – blue, green and black – representing different shades of glacial ice. Blue ice can be found in the Mont Blanc Iced Sea and is formed when there are air bubbles in it. Green ice is found in Antarctica and is the result of the presence of microscopic snow algae. Black ice appears when it contains no air bubbles, allowing it to absorb enough light to look black. It can also turn black due to deposits of volcanic ash in its structure, a phenomenon that can occur in polar regions.
