Introduction

Montblanc is once again redefining luxury watchmaking by honoring its heritage while embracing modern techniques. The newly launched 1858 Geosphere Annual Calendar is a remarkable addition to Montblanc’s distinguished collection, showcasing a masterful blend of traditional horology and innovative features.

Case and Crystal

This exquisite timepiece is housed in a 42mm x 13.3mm case available in either opulent Lime Gold or robust stainless steel. It showcases Minerva's iconic fixed fluted bezel, which is a nod to the company’s historic designs from the 1920s. Complemented by a scratch-resistant, domed sapphire crystal with an anti-reflective coating, the case guarantees clarity and durability. The transparent sapphire caseback provides a captivating glimpse of the movement inside, making it as stunning from the back as it is from the front. The fluted crown, which proudly displays Montblanc's logo, is conveniently located at 3 o’clock, alongside a recessed pusher designed for date adjustments.

Dial Design

The dial's sophistication shines through with its silvery-white finish, featuring a large date display framed at 12 o'clock. A rotating ring around the periphery indicates the month, with a thoughtful detail that replaces July with "Minerva," marking the anniversary of the trademark registration in July 1887. A vibrant red arrow highlights the current month, adding a touch of elegance to its functionality.

Unique Globe Feature

A standout feature of the 1858 Geosphere Annual Calendar is the intricately hand-painted, three-dimensional globe created by Swiss artisans. Made from sapphire crystal, this globe effectively represents the Northern Hemisphere, with an option for a Southern Hemisphere version upon request. Notably, it’s demarcated by an orange Greenwich meridian line and encircled by a 24-hour scale complete with Day & Night indicators.

Dial Details

Within the dial's interior, there is a minute/second track and a textured chapter ring, where arrow-shaped faceted hour indices direct attention inward towards the sunray-brushed circle. The stainless steel variant boasts striking blue-coated indices and hands, while the Lime Gold model's rose gold details exude luxury. Both versions are enhanced by white luminous coatings on the hands for enhanced readability in low-light conditions.

Movement

Powering this exceptional timepiece is the hand-finished, manually wound MB M14.58 movement, which features a large 10mm balance wheel with screws for enhanced precision. The calibre draws its inspiration from the MB 14.08, which was previously employed in the limited-edition Montblanc Heritage Pythagore series and traces back to the historic Minerva “Pythagore” calibre 48, designed by renowned watchmaker André Frey in 1943.

The MB 14.58 movement is innovative, deviating from straight lines of its predecessors to incorporate an additional bridge for the central seconds display, all while remaining faithful to the exquisite craftsmanship of earlier models. It boasts hand-chamfered edges on the rhodium-plated German silver plates and bridges, adorned with elegant Côtes de Genève decoration. This movement, equipped with an annual calendar and world timer module, operates at a frequency of 18,000 vibrations per hour, featuring an impressive 65-hour power reserve.

Conclusion

With its blend of tradition and modernity, the Montblanc 1858 Geosphere Annual Calendar is set to become a coveted piece for watch enthusiasts and collectors alike. Don’t miss your chance to own this extraordinary fusion of art and engineering!