The present example of reference 6538 is a wonderful specimen from 1957, featuring the correct dial, bezel and winding crown. The most notable detail to scholars is however the superb "4-liner" chronometer dial, whereas most earlier examples featured only "200m=660ft" and "Submariner", the present watch furthermore mentions "Officially Certified Chronometer" on two further lines. Close examination reveals that the four lines are not plainly printed in the same style, using the same font and color, but are of three different types. The depth rating is printed in silver-white, while the model name is gilt (as well as the coronet, "ROLEX" and "OYSTER PERPETUAL" and the outer track with minute markings). This is however not printed in the disk surface, but in "negative" from the dial plaque underneath. The last two lines are again printed on the dial, however in a more greyish-white and with thinner letters.
The present watch is in very original condition, with an extremely sharp case with wonderful porportions and sharp edges.
To many Submariner collectors, the true James Bond reference 6538 is the one to have. To those who are already lucky to call a "coroncione" (Italian for "large crown") their own, this example is an extremley nice one to have.