Charismatic

I just purchased a Rolex from a reputable dealer. I took it home and popped the bracelet off. Above the crown on the case I found the engraving "OG POFY DESN". This is not a normal marking. The watch is supposed to be an authentic Rolex Datejust from 1984/85 range (according to serial number engraved in case. Also below the 6 o colock on the case the word "Stainless" is spelled "Stainess", it is missing an "L". With the quality control Rolex has I doubt it left the factory that way. Does anyone have any clues as to what this may be. The watch has been tested, the gold is real, a markings match up except the aforementioned above. Any serious help would be much apreciated. Thank you!