I've repaired antique clocks for over 40 years. In my earlier days most people were familiar with winding and setting a mechanical clock. Not so these days. I have people buy an old clock at a yard sale and bring it too me to find out where to change the battery. They need the winding process explained. Of course after wasting my time which I don't mind as I love explaining their new treasure to them they think I am overcharging them when they need a $10 key. They really balk when I quote $250 for a complete overhaul.