Thank you for the clarification, unfortunately, my question is more complicated.
I have unmounted the bezel and, as I did without any problem on many watches, I tried to remove the ring which keeps fixed the Crystal by the gasket on the case.
No way, it is too tight so my best alternative is to swap another cyclop on the crystal, but I have to do unmounting the movement, dial, hands, all together and leave empty the case to reduce any kind of risks.
My only worry is if the crystal gasket is like the common Submariner 16610, Daytona 116520, GMT 16710, etc, they have almost the same thickness even if they have different height.
If warming and burning the cyclop with a high-pressure flame to unglue the cyclop, meanwhile the crystal is mounted on the case, the gasket could warp and become useless, then I have to find a replacement gasket.
So, the question is, the ARF 116610 LN 904 A2824, use the same thickness gasket than the older models or it has a thicker one like the GMT 116710 ) same height but thicker than 16610 etc.
And it is not so easy to find as a spare part.
I hope now my question is clearer