Here at OTC, we are lamenting the loss of one of our favorite bags – the No. 43 Mailbag – made by American leather goods brand Colonel Littleton. The design for the No. 43 was based on the iconic U.S. Postal Service mail carrier bag, once a ubiquitous sight on America’s tree-lined streets. This roomy and distinctive leather bag is beautifully crafted and exceptionally durable, ensuring that the more it’s used, abused, and put to work, the better it will…