Dear watch aficionado.
Here a nice example of a Rolex 6105 pink gold with a beautiful black épargne dial:
These black dials were highly complicated to produce. They used the famous épargne method for the minuterie and swiss made signature. After that, the dial was treated in a black galvanic bath and then protected by a so called "sapon", which was a translucent lacquer used for protection against oxidation. The signature "Rolex Oyster Perpetual" & "Officially Certified Chronometer" are made with the décalque doré method by using red gold powder onto the sapon. The sapon on the present example has been "eaten" by the radium lume over the last 70 years, which adds tremendous character. By examining the back of the dial, one can see all the correct details to conclude that the dial is all original. The indexes are fixed by "pickage" and then leveled by "limage" as you can see on the photo of the dial from the back. This method called "pickage & limage" was used back then at that time. These methods, "épargne, pickage, limage" can be seen as well on famous dials as the Bao Dai.
I invite you as well to take a look at my site www.watchcollector.lu for the current offer of vintage and independent timepieces.