I need your help. I recently purchased an X-Metal Juliet with Black Iridium lenses. The seller claimed it was a 4th-generation pair, and as we know, 4th-gen Juliets are non-serialized. I want to confirm whether this is truly an original 4th-generation frame or if it has been refurbished. Can you help me determine whether the finish is stock or if it has already been blasted? The seller said it was bought brand new in Hong Kong around 2008.