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Re: how do take off the knob that winds the hands on a...
The knob doesn't come off. It is attached to the stem, inside the watch. The only way to remove it, is to open the watch, pull the stem out, loosen the plate and move the pawl out of the way of the stem. If you ever want to use the watch again, it's best to have a jeweler or watchmaker do it.
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Your watch needs a service. Options are to send it to Rolex or to bring it in to a Rolex re-seller that offers watch repair. You do not have to send it to Rolex. Expect to pay between $200-$500 depending on what may need to be replaced.
Almost all automatic wristwatches made today have an 18-24 hour "power reserve" when fully wound. A 24 hour reserve is actually very, very good. I can't think of a modern self-winding wristwatch that has a 48-hour power reserve because that would require a super-long or much larger mainspring than would fit in a modern watch movement / case. There may be some hand-crafted or super-premium watches that can do this, but only a very select few.
Manual wind railroad pocket watches, which were some of the finest and most accurate mechanical watch movements ever made, generally had a 40-hour power reserve. That extra capacity was created by using a large mainspring to store the extra energy. These mainsprings could be used because of the much larger size of these watches, compared to modern wristwatches.
If you are concerned about keeping your watch ticking, even when you're not wearing it, you might want to look at a "watch winder"--basically, a small watch case that rotates the watch for you, keeping the automatic winding rotor moving and the watch ticking. In addition, sitting at a computer all day will wind your watch much less than walking and otherwise moving around. Even though you're wearing your watch, if you're not moving, you're not winding it.
To set a basic wristwatch, simply pull the crown (the winder button at the 3:00 position on 99% of watches) out gently - it will click into adjusting position. Wind to send time and then push back in again.
Variations on this are: If you have a watch with date display, the crown will have 2 positions, the first click will be to set the date and the second click (fully out) is to set time. If you need to adjust the date, I suggest you wind the date to the day before you need and then use the second click to wind the hands to the correct date. This way you will be able to know if you have the hour at a.m or p.m position and avoid it have the date changing during the day instead of at night.
One last variation for wristwatches is a screw down crown. Some water resistant and sports models incorporate an added feature whereby the crown is threaded so it can be tightened down to avoid water entering - the most common place water gets into a watch! If you have one of these, you simply need to screw the crown anticlockwise until it pops out and then refer to the instructions above. Don't forget to push and screw the crown back in clockwise when you are done
Wind it back and forth at least 15 times, then twist the watch very quickly back and forth a few times. That should restart the balance wheel moving. Twisting motion must be around the axis on which watch hands are fitted.
You have to wind the watch first. Pull out the crown (the knob on the right side of the watch) to the intermediate position (the winding position will not move the hands or the date so this is how you know that you are in the correct place. Most watches have 3 positions where you can set the date, time, and wind it) and wind the watch. It will need to be re-wound every 24-48 hours.
i wind the clock hands forward until the calendar date and week day changes and then i re-wind the hands until it comes to the correct time. when i re-wind the hands, the week day goes back to the correct date and the calendar date does not go back by one day. i don't know if this is the "correct" way to do it, but it works.