Hello all, I am looking at a Daytona Cosmograph that I am hoping to trade several watches for and after reviewing the Vintage Rolex Field Guide, I am finding several inconsistencies on this watch. . The Serial Number is L465284 which I believe dates from 1990, but according to the Field Guide it should not have the "officially certified chronometer" on the dial. The Model Number is 16523 which would date from 1991 to 1999, which is later than the L Serial Number. I am not sure if this is considered a intermediate watch or is a service dial. Any help on this would be greatly appreciated. Also I have searched sold watches on eBay to get an idea on value and there are not any examples from this year. I am guessing around $13,500 for a value, and would really appreciate any insight on value. Thank you @morningtundra for your amazing book. @Dan S please chime in if you are able, your advice has been invaluable in the past.