Montblanc 1858 geosphere annual calendar (2025) 

Cased in stainless steel in 42mm diameter with 13.3mm thickness, fixed fluted bezel in white gold, sapphire crystal with display caseback, fluted crown with Montblanc logo in relief. Water resistant to 30m. The dial is silvery-white coloured with blue-coated plated indices and hands, 3D sapphire hand-painted Nothern hemisphere painted turning globe and month disc. The movement is powered by Calibre MB 14.58, manually wound movement. Power reserve is 65 hours. limited to 100 pieces Priced at USD 45,500 in steel