Here is a Replacement Rolex James Bond Brevet 8mm Big Crown for Submariner ref.6538 and 5510 with tube.
Value Rolex submariner ref. 6538/6200 so called Big crown "James Bond":
Many vintage Rolex collectors call all early Submariners without crown guards (shoulderless) the James Bond Submariner, while others in the watch collecting field believe that the watch Connery wore in Dr. No and the others was the Rolex Submariner model 6538.
Still other collectors believe that the Submariner Connery wore was more than likely one of four models or that perhaps each of the four models made an appearance in each of the early films, they are the 6200, 6538A, thick cased 6538 and the 5510.
I believe that it is impossible to nail it down to one of the four models, and I'll get into the specifics later.
All four models share the same thick case, a large crown marked Brevet (from the French word Brevette meaning patented), a coin edge non ratcheted bezel, an acrylic crystal, a depth rating of 200m/660ft and mercedes hands. It should be noted that only the "thick cased" shoulderless Submariners had the large winding crown. Further, it should also be noted that the 6538 existed first as a thin cased model with a small crown. It became a thick cased model as the 6538A and was available alongside the 6200 .......
--------- When James Bond progressed from novel to film his watch could now be seen. In Dr. No, Sean Connery is clearly seen wearing a Rolex Submariner. This watch is described in Dowling & Hess' book. Rolex Reference No. 6538 or 5508 is now known as the James Bond Submariner. Bond's arch enemies also wear interesting timepieces. Three worth mentioning are Donald "Red" Grant, Goldfinger and Scaramanga ... ...
