Hallmark stamp on the back (shown in pictures). The item "Authentic CHANEL Silver Crystal Letter Logo Safety Pin Brooch Pin Hallmark Stamp" is in sale since Sunday, February 23, 2020. This item is in the category "Jewelry & Watches\Fashion Jewelry\Pins & Brooches". The seller is "poshforkeeps" and is located in Fort Lauderdale, Florida. This item can be shipped worldwide.