The bronze medal of mcm Boston is Bao's identity number, which is equivalent to the birth certificate. The code of bronze medal on each mcm package is different. The code of mcm Boston bronze medal consists of letters and numbers; It is marked with a unique number. Only a few international brands have different codes on each product.

MCM is a German luxury leather brand, founded in Munich, 1976. Brands are mainly clothing, apparel and leather goods, especially leather bags, which are deeply loved and sought after by the public because of their fashion, luxury and practicality.