As I am not an expert, I always recommend authenticating rather than giving my opinion, especially with 1 pic. However the HW mark IS normal. This indicates the 24K gold plating. Chanel stopped using this in about 2009. There is a great thread on Chanel HW through the years, but I don't have time to look for it now. Why don't you take some pictures and try the authentication thread for peace of mind.