without having the dial in my hands ....
however Rolex is right for more than a reason :
1) I know for sure that their records about these modern watches are far better than those for vintage ones ;
2) the " inverted 6 " can be seen also in other dials for 16519 ( like in the white one with diamonds that is also without the " T " )
3 ) the diamond dial with inverted 6 mentioned by me above has black subdials too.