MontBlanc Messenger. SKU: 198865. Montblanc Extreme 3.0 Messenger Bag with M LOCK 4810 Buckle. The Montblanc Extreme 3.0 Messenger Bag combines modern design with functionality. Crafted from embossed black leather, it features a secure M LOCK 4810 closure on the front and a spacious main compartment with an easily accessible front pocket under the flap. An internal open pocket keeps essentials organized, while the adjustable and detachable shoulder strap ensures comfortable, versatile wear. Personalize the front lock for a unique, individual touch.Dimensions: 9.4 W 2.6 D 7.1 H.