- 9/8/10
- 872
- 740
- 93
The bit I don't know is if the pores are open when you laser it back as you take away a small top layer of the aluminium surface, so you'd need to open them back up (with acid?), which would strip the black die off it. Whilst laser engravers weren't available to Rolex back in the day, I would be surprised if they didn't try many methods, before coming up with the pad printed mask method as 'the best'.