Rolex Datejust correct fluted bezel per Reference?

[gamba66]

Hello,

I am currently searching for an original Rolex fluted bezel for the reference 16234 but most of the fluted bezels on ebay are from 4 digit watches and some are aftermarket.

This is the information I have gathered so far:

4 digit fluted bezel = about 3 gr weight and 1.88 height

5 digit bezel = about 5gr weight and 2.26mm height

Now I just came across a bezel (that even has hallmarks) that is 5 grams weight and has a height of 2.42mm.

Is it aftermarket? Would greatly appreciate some help :)