66288 is it a valide number

Patsy, S8821577 was not found to be valid #. Best to take your watch into a good jeweler and have them match the battery and install for you. Check the attached links,instruction and guides, Good luck
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Watch Battery Cross Reference Look Up Any Watch Battery
http://www.batteriesinaflash.com/info/watch-battery-cross-reference
Specialty Battery Finder

Serial numbers can be just as fake as the items themselves. Only a qualified jeweler or watchmaker can validate your question and then only if you present the item for inspection. Many people buy these items online or in non-certified auction settings and get a "great deal" on them. Most find out they have fakes. Real quality items aren't just given away 99.9 percent of the time. There are many out there just looking to scam the unwary buyer who thinks they are getting something on the cheap. You may have a real one, but no one can tell you that online via text or even with a photo. Only the real deal with a professional who knows the product can validate its authenticity.

There is no specific date as of yet, but it is slated for a Spring 2015 launch.
Apple Watch release date news and features

If you did not pay cash there is a record with your credit or debit card comapny.

Snopes.com seems to be a valid site.

If you don't have this ORIGINAL VALID STAMPED INTERNATIONAL ROLEX WARRANTY then your watch does not have any warranty. Just approach the dealer and ask him for ORIGINAL VALID STAMPED INTERNATIONAL ROLEX WARRANTY otherwise your watch does not have any warranty

It can take some time the first time it is switched on.

If it doesn't work after a couple of hours, take it back to the supplier.

1. Locate the screw on the side of the watch face. This screw is what you will use to set the time on your watch. Water-resistant watches have a screw-type crown, and the screw must be turned toward the body (unscrewed) before it can be pulled out for further use. If the watch is not water-resistant, the unscrewing is unnecessary.
   
2. 2 Pull the screw gently outward. The screw can be pulled outward in two positions. The first position sets the date and day. Pull the screw out farther (into the second position) to set the time.
   
3. 3 Turn the screw either clockwise or counterclockwise to move the minute and hour hands to the desired time. Push the screw all the way in (and turn it away from the body if you have the water-resistant model) when you are finished.
   Digital Watch
4. 1 Locate the three buttons on the side of the watch face. These are the buttons used to set the time. The top button is the "+" indicator for increasing the numbers. The bottom button is the "-" indicator for decreasing numbers. The center button is to activate the setting mode.
   
5. 2 Press the center button in for one second. The watch will beep.
   
6. 3 Press the top "+" button for two seconds. After the watch beeps, you can begin setting the time.
   
7. 4 Press either the "+" button or the "-" button (depending on whether you want to increase or decrease the numbers) to set the time.
   
8. 5 Press the center button when you are finished. The watch will beep. This validates the setting. The seconds will revert to zero.
   

Read more: How to Change the Time on Tissot Watches ' eHow.com http://www.ehow.com/how_5934972_change-time-tissot-watches.html#ixzz14ifvni46

Above link no longer valid. Here's the current one:
http://ftp.casio.co.jp/pub/world_manual/wat/en/qw3157.pdf

Also, the key was inputting the correct #, in this case 3157 - NOT the 100B - at the following page:
http://world.casio.com/wat/download/en/manual/
I had almost given up when I looked again at the back of my watch and found the other number.

Push the middle button then touch the centre screen selecting the "nits" mode(24 C m), then push the middle button again for 5 seconds."Synchro" will appear on the display. By using pushers + and -, bring the two hands pre-cisely to 12 o'clock Incrementation of the minute hand(3 steps=1 minute) Incrementattion of the hour hand(3 steps=1 minute) Press the middle button to validate the setting.