Montblanc Messenger. Sartorial series. SKU: 198127. Color: Black. Size: 10.0 x 2.8 x 6.7. Montblanc Black Sartorial Leather Messenger Bag. This messenger bag is a stylish addition to the Sartorial collection. The main compartment is spacious enough to hold a small tablet, while an exterior zipped pocket offers quick access to essentials. Wear it as a crossbody or over the shoulder using the adjustable leather strap, or carry it under your arm for versatile, everyday use. Material: Bovine leather.