I recently got my wife a Rolex OP 34mm which has engraved case back as it was a "service" watch which I DO believe the engraving was done by Rolex as I did not see this particular dial except for this model (Hard rock 10th version - white dial OP 34mm).
My wife LOVES this PARTICULAR dial due to the contrasty markers with black surroundings. (easier to see - reason why she moved up from 26mm to 34mm)
Now, it does not really bother me or her regarding the engraving. BUT that said, once service is due, would RSC swap out the case back with plain one if requested even though it did not come with this PARTICULAR watch from factory? (I hear case backs are cheap parts - relatively speaking)
OR will they insist that they only replace with factory engraved one since that is "correct part" for this particular model/serial?