With the 2004 model Turn-o-Graph came additional security features. This was the first model to feature laser-inscribed markings on the internal face of the bezel. This feature quickly followed through into other models such as normal gent's Datejusts, and may well follow across the entire range. At the 6 o'clock end of the bezel the repeated word "ROLEX" stops and the unique case-number of the watch appears. This means that, at the time of writing ( Xmas '05 ) you should be able to find such watches ONLY with F or D case-numbers. I wonder how long it will be before the fakers have copied this feature?