Men's Montblanc Extreme 3.0 Backpack With M Lock 4810 Buckle - Purple - Backpacks Montblanc Mens Backpack. SKU: 199404. Color: Cassis. Size: L 11.81 X H 5.12 X W 16.14. Montblanc Extreme 3.0 Backpack With M Lock 4810 Buckle. This Cassis backpack......