Rolex 5508 dating from the second quarter of 1958 is one of the last of the “thin case” James Bond Submariners, and as far as I know was the last Submariner rated to only 100 meters.
The 5508 was a transitional model, using the same case as the 6536 but the later cal 1530 movement with 25 jewels and Kif flector shock protection. As it uses the old style case and dial and the much more modern cal 1530 movement, the 5508 is by far the most usable of the early thin case Submariners.
Two generations of serviced dials. Need a Gilt 5508 😊
For details of this service dial please refer to the forum