Help with Rolex hang tag and box sticker

[highcotton]

I recently bought a 16800 with a matte dial. Included were two hang tags one had the serial number of the watch on it. Here is a photo of the other tag and the sticker that was attached to the outside of the box. What do these numbers represent? I assumed that it was from another Rolex model that the original owner had and just threw it in the 16800 box but why write the number on the outside of the box?



Also the box had a black circle sticker and I noticed the box for the birth year 16570 I bought my son for his graduation had a tan circular sticker beside the sticker with the model number. What is the purpose of the colored round sticker?