Montblanc Mens Backpack. SKU: 220321. Barcode: 4069153003166. Size: 30 cm x 13cm x 41cm. Montblanc M-Lock Backpack. Crafted from luxurious black grain calfskin leather, this piece showcases the signature M LOCK 4810 buckle in a sleek aluminium-titanium finish, inspired by the world of mountaineering. Designed for modern urban explorers, it combines style with practicality, featuring a padded compartment for laptops up to 13, multiple organizational pockets, and two dedicated loops for writing instrumentsmaking it a dependable companion for everyday adventures.