Step 1 : Introduction to the question "Which of these brands is known for selling the Birkin bag?"
...A Birkin bag is a luxury handbag by French fashion house Hermès, known for its craftsmanship, exclusivity, and high price. Made from premium materials like calf leather, ostrich, or crocodile skin, each bag is handcrafted by skilled artisans. The idea originated in 1983 when British actress Jane Birkin mentioned to Hermès CEO Jean-Louis Dumas on a flight that she struggled to find a stylish yet practical bag. Dumas sketched a design on an airplane sick bag—and the iconic Birkin was born. Today, it remains one of fashion’s most coveted status symbols.