This is a vintage Coach Medium Slim Duffle bag in black leather with brass hardware, inner zip pocket, and adjustable strap. Made in the United States, number L0D-9816. In excellent condition, though missing the hang tag. Shows extremely light wear on the edges, a white mark on the inside bottom corner, see photos. 

Height, top to bottom - 9 inches
Approx Width - 10.5 inches
Depth front to back - 3 inches
Strap total length - 46 inches