Leave your detail demand in the comments when you place orders.Any questions, please Feel Free to contact me Timely, I will reply within 24 hours. The Oyster bracelet is a perfect alchemy of form and function, aesthetics and technology, designed to be both robust and comfortable. This self-winding mechanical movement is at the forefront of the art of watchmaking. it offers fundamental gains in terms of precision, power reserve, resistance to shocks and magnetic fields, convenience and reliability. Add a small window convex lens on the mirror to enlarge the calendar and read clearly. Small windows are easy to recognize the round arched appearance..syi