A Watch of this variety is driven by a rotor and mainspring. The rotor uses wrist movement to turn, As well as in doing so winds the mainspring. This transfers Vitality towards the balance wheel, which provides regulated energy to your arms. The stainless steel circumstance is rust-resistant and hypoallergenic. https://www.watchesworld.com/summer-delights-top-watches-for-men-and-women/