Ladies Rado Florence Integral 153.3606.2N Sapphire Two Tone Bracelet Watch

Model no 153.3606.2N Case size 18mm Lug width 13mm There is a small black mark inside the watch (as shown in the picture between 10 and 11 o clock. I’ve had this for a few years and now don’t wear it anymore. The watch is really beautiful and fully functional and the mark doesn’t affect the use.