CHANEL Chanel J 12 men's watch- unauthenticated

This is a Chanel J12 watch made of black ceramic with a black dial.Brand: Chanel.Model: J12.Material: High-resistance black ceramic.Case Size: Common sizes include 33mm or 38mm bought from an estate sale. They did not have a box or receipt. I bought seval high end pieces at a good price due to being unauthenticed. I am listing these as UNAUTHENTICED. I do not know watches. This is a REALLY nice watch though. Needs a battery. Heavy, well made. That is all I know. I took it to a local jeweler and he was unsure as it was so well crafted.