Simple and effective! The CC logo in a silver-plated metal and black enamel circle. A rare brooch design, mirrored geometry, signed on the back in full (the C is slightly worn) within the clasp. This signature style is uncommon, but I believe a brooch from the same series with the same signature can be found on two major websites right now... and I have a gold and silver version for sale on the site. I mention this because there are so many fake Chanel jewelry pieces online that I preferred to do some research before offering them to you! I don't think the box is original as it seems more recent. Very good used condition, see photos.
Diameter 4 cm.