What does md_8874 mean? As far as I know, it should be MD, which is the name of the brand series, and 8874 is the model in the series. Big brands do this, and generally have their own anti-counterfeiting labels, such as Supor sunglasses, RB, and the words and trademarks on the temples are also very clear and neat, which is not easy to wear. Each brand serial number has its own characteristics. Another important anti-counterfeiting sign is that as long as you blow into the lens, the trademarks of four swans will appear. Sunglasses are usually these methods to distinguish between true and false, I hope it will help you.