Royal Oak Offshore 25721ST Advice/Opinions

[Il-Re]

Hi everyone, I'm considering the 25721ST.OO.1000ST.06. Does anyone know when these were produced and which movement they use, I seem to find conflicting information online that it uses the original offshore movement 2126/2840 which is an old movement which AP apparently will not service but rather replace with a newer caliber. Other articles or online information suggests it uses the 2226/2840 or 2326/2840. Is there any way to know which movement was actually used, also is there anything to be aware of in particular regarding these calibers? are they generally reliable and straightforward to service, I know they have a modular chronograph, but the base JLC calibers are usually pretty reliable. I do like the look of them and I like that they come on a bracelet (I did originally think of the offshore diver).

I'd be looking to wear this more regularly and use it as a more day to day option vs the jumbo more for evenings out etc.