The more i look at this, the more i get convinced that there is no DLC coating on the case whatsoever.
C'mon guys, is it only me or no one else here sees the heavy purple hue ... I mean it is so obvious and girlish in a way. They tried achieving the 386 color by doing the following.
-First the stainless steel case was blasted with an Dark Alumina Oxide 270+ Mesh. A very fine sand in dark color that gives both a very fine matted finish that in the same time darkens significantly the Stainless steel.
-Second the case was PVd'd in TiAlCN(ML) /Titanium Alminium Carbo-Nitride Coating
The reason why the end result came out so dark vs. to the usual light purple color that this type of coating gives is the SS case and buckle were both blasted with very the very abrasive Dark Alumina Oxide sand. I have also posted below a picture of different parts being coated in TiAlCN... you may say that they look lighter in color and shinier and you will be certainly correct. The reason behind that is because they werent finished/blasted the same way the 386 from PT was done with the Dark abrasive media.
So i believe, not, I know that there is "0", none, nada DLC coating in this watch whatsoever. The dial looks great BTW
Look at the pictures... how purple the brown color looks like??