Perpetual motion, the action of a device that, once set in motion, would continue in motion forever, with no additional energy required to maintain it. Such devices are impossible on grounds stated by the first and second laws of thermodynamics.

Perpetual energy may refer to: Perpetual motion, the property of an imaginary device that, once started, continues to move forever with no input of external energy. Renewable energy, energy collected from resources that are naturally replenished on a human timescale.

It is true that gravity is “unlimited” in the sense that it never turns off. Earth’s gravity will never go away as long as it has mass. But since this is just a force and not an energy, the never-ending nature of gravity cannot be used to extract infinite energy, or any energy at all, for that matter.

An automatic watch, also known as a self-winding watch or perpetual motion watch, is powered by energy stored in the watch’s mainspring. The energy is generated by a weighted rotor that spins as the wearer’s wrist turns.

Watch movements are expensive to make. Further to that Rolex uses some of the most innovative materials on earth in their watches, they use 904L stainless steel rather than the luxury industry standard 316L stainless steel. This material is very hard, corrosion resistant and virtually indestructible.

You cannot overwind a modern Rolex watch when manually winding it. Today, Rolex designs its watches so that you cannot overwind them no matter how much you wind. The winder simply disengages once it reaches max wind.

There was a time long ago when Rolex produced the Rolex Oyster Quartz which had a battery but they have almost immediately stopped producing this watch. Nowadays, all Rolex watches are mechanical and use either automatic (self-winding) movements or in some cases, a manual wind movement.

Both quartz and automatic watches are reliable and have the ability to tell fairly accurate time. However, quartz watches are considered superior when it comes to accuracy. A quartz watch can measure exact time to within half a second per day. An automatic watch may be off by a few seconds per day.

Maintenance-wise, automatic wristwatches only need a once-in-a-lifetime mainspring replacement. Thus, they are ideally preferred by most as they tend to last for more years. Quartz watches are battery-operated. The produced energy, together with the help of the quartz crystal, powers the stepping motor.

Quartz movements are far more accurate than mechanical movements. Another benefit is convenience. Aside from a battery change every couple of years, a quartz watch will continue to run without the need to wear it or wind it.