Need help authenticating bracelet

[jb8978]

I recently purchased this 1991 Rolex datejust.
However, when I looked at the clasp , the clasp code reads R & should read P.
R code is from 1993. I also took notice that next to the R code is a Rolex crown & not the month number.
This watch was serviced by Rolex in May of 2021 , & came with the warranty card.
I would appreciate any help , please see the pic below of the clasp & let me know what you think.