Cross body Leather bag by Rowallan.

This Rowallan bag is a vintage or classic collection due to its specific hardware and design, which differs slightly from the currently available models. While the general style is consistent across many Rowallan bags, a specific model number like D-90 isn't explicitly mentioned in connection with a turquoise interior in the search results.  Key Features Material: Crafted from genuine, high-quality leather that develops a natural patina over time. Design: Features a classic flap-over design secured by a magnetic catch with a buckle detail, and an embossed Rowallan logo on the front. Pockets: Includes an inside zipped pocket, an open pouch (or two slip-in pockets), and two leather pen holders. There is also a zipped pocket on the back of the bag for secure items. Lining: The interior is fully lined with a fabric, typically matching in color or a coordinated design, such as a chequered pattern in some cases. The "turquoise interior" you mentioned is a known lining colour option for some of their brighter leather lines. Strap: Comes with a fully adjustable leather shoulder strap, often featuring a non-slip webbing on the underside. Hardware: Features antique brass effect hardware.