Certainly appears to be an authentic oldie.
Appears to be eye clean.
It will be very apparent that it is yellowish, especially because it does not have any compensating fluorescence.
Have you seen M colored diamonds - the cut will make it appear more O-P.
Thank you for the feedback. I looked at an L color OEC in person and the color didn't bother me, but it also faced up pretty bright. I have not seen any M colored diamonds in person.
I like it...ask for an up-close video of it. Ask the vendor to show you where the inclusions are on the blown-up image of the stone.
(does the vendor have it in hand?)
M will show tint but it looks* to have good light return so should be a relatively bright stone. This is just from viewing the one image on
the fingers. I retain the right to change my mind with more images or videos.