No offence, but you really have no idea what you are talking about. Your opening remark about your rolex being a paperweight, clearly demonstrates that. I guess its just a brand for you, and your do not appreciate what a good swiss mechanical watch really is.....
Just off the top of my head....
My GMT Master II, made of 904L steel and 18K gold, with a synthetic sapphire crystal, has the 16713 self-winding mechanical movement registered to Montres Rolex S.A. It has roughly 200 moving parts and 31 jewels in its movement.
It is certified by the Controle Officiel Suisse des Chronometres (COSC) as a Superlative Chronometer. This means that the movement is accurate to within -4/+6 seconds per day accuracy.
This particular model has been timed by Certified Rolex Technicians using a Witschi Watch Expert watch timer to within +/- 1-2 seconds per day, rather accurate for a mechanical timepiece yet completely inferior to every "cheap circuitboard" out there that contains millions of electronic parts in a space smaller than a thumbnail.
It was last serviced in 2007, requiring replacement of the mainspring and the escape wheel. Less expensive movements use metals other than brass but brass is used in mechanical watches because it can't be magnetized. The downside to this is that the parts are delicate.
As mechanical wristwatches go, it is nowhere near the level of complexity of the Patek Philippe Grande Complication which has over 24 complications and generally retails around three quarters of a million dollars. It is also bulky when compared to the Concord Delirium IV, the thinnest wristwatch ever made at 1.98mm.
It's also not as sturdy as the 11671 movement, which now features a ceramic bezel and solid center links in the Oyster Bracelet.
As far as Rolex's exploits undersea, I am well aware that in 1960 Jacques Piccard had a specially designed Rolex attached to his bathyscaphe Trieste when he descended the Challenger Deep to a record depth of 10,911 meters.
I'm well versed in the history of Rolex since one of my market research presentations 20+ years ago in college was on Rolex S.A. The founder of Rolex (an entirely made up name that is said to have come from a rearrangement of letters in the phrase "horlogerie d'exquise"), Hans Wilsdorf, started his career as a train engineer who bought and sold watches for train conductors.... eventually he founded the company that would make the first reasonably sized timepiece to wear on a wrist, and the first waterproof watch, the oyster.
Did you know, by the way, that Rolex is owned by a non-profit, the Hans Wilsdorf Trust, that their net proceeds after expenses help fund scholarships and that as part of the company charter, Rolex can never be bought or sold away from the ownership of the Wilsdorf Trust?
Cheers.