I can't get the back on after changing battery. Please help. I know there is a particular place for the wind stub to fit. It won't go back together. Please help.

For a quality watch like that I would recommend using a specialist watch repairer as they can reseal the watch to be water tight after the battery is replaced.
Could you possibly comment below with a photo of the back of the watch?
There are three main types of watch back plate. Push fit, screw down and screw on.
Push fit is usually a smooth back cover with No notches or grooves. These can be gently levered off to replace the battery then pushed down to 'click' back into place. Some have a slight notch on the body or back plate to make removal easier.
Screw down back plates have dimples or notches at regular places around the edge. This is to allow grip to unscrew the whole back plate. Some versions need a specialist tool to unscrew them.
Screw on plates use four tiny screws to hold the back plate down. These are more commonly used on 'Sports' or digital watches.

Waterproof or water resistant watches usually need a wrench to unscrew the back. I use a pair of 90 degree circlip pliers. A jeweller would remove the strap and fit the watch into a holder before using the wrench.

Few jewellers would guarantee the water resistance of a watch after fitting a new battery. If it is required a watch be returned to its original specification it must be returned to the manufacturer or an agent for battery fitting and pressure testing.

Some watches have a back that is pressed into place. Fairly easy to prise off but very difficult to replace without the tools. This type does not have the grooves a wrench fits into.

I don't know the battery type for your watch but I would suggest you get the battery change done professionally. They can replace the seal and guarantee its continued water resistance on your particular model. Sadly I learnt the hard way and after the DIY battery change on my (now deceased) Armani watch it filled with water on my next visit to the swimming pool!

mcdevito75 here, Best Bet is to look for a small watch repair shop in your area, they can authenticate your Gucci watch for you. If you can, remove the back cover of your Gucci and record any and all numbers and other info off the watches movement itself then check online at Gucci.com. If your not familiar with watches, specially Gucci an expensive watch let a small watch repair shop remove the back cover and give you all info needed to authenticate the watch.

There are several models of this watch and you don't say which one you have but thi range are either automatic (which means that it is self winding) or quartz (battery driven).

If it is not going it could be
(1) (for a quartz watch) the winder has been pulled out (push it back in) or the battery has expired. (Do you know how old the watch is?).

(2) If the watch says "automatic" on the face, then it haas probably just run down (they run for 2-3 days if they are not used). If this is the case, holding the watch horizontally, swing it gently from side it side for a few minutes (this will operate the self winding mechanism) and the watch should then start. To keep an autimatic watch operating it needs to be worn daily or placed on a winder when not in use.

mcdevito75 here, The answer is no, Rolex watches do not operate with a battery. Most Rolex watches are Automatic winding with the motion of your wrist / arm. Of course if you leave your Rolex on the dresser for say 30 hours, it will run down, simply hold the watch in your hand and with a gentle rocking motion say from 6--to 12 O'Clock for about 30 seconds, this will give your automatic Rolex an initial wind up, from there you just wear the watch and it will continealy wind itself. You may also have the non automatic Rolex in which case you would have to wind it dailey. If your Rolex will not run at all no matter what you try, Check out the repair service directory here at fixya, bottom of the page click on repair service directory then watches.

Take an eyeglass and read the small letters and numbers under the balance wheel. This is calibre number. Submit it here = then I probably will be able to give advise.

Probably you changed battery youself. If that's right, then open watch again, take battery out and check it with tester if it is fully charged. If yes- put battery back in place and secure the contact. Now carefully check for AC sign on movement. When found- take fine tweezers and connectAC with battery+ for 3 seconds.
Watch should work now, but resetting is needed. Use your watch manual to reset all watch functions.
NOTE: Some movements require connect AC and+ twice. This should be written inside caseback or on battery cover.

Good luck.

Arthur

The problem is that water or humidity is getting into your watch. You either need a new back gasket 9 probibly nicked when changing a battery, or your crown ( the little piece used to change the time) gasket is bad, or you have a crack in your crystal. Turn your crown as if to wind it , if it turns REALLY easy your crown gasket is bad, if not you need to open your watchback and insert a new gasket around the back cover. Make sure that it fits tight ( you probibly have to stretch it a little) and then reclose the watch. The only place I know you can get a seal is at a watch repair shop.

Like many other watches, the Relic Wet's battery can't be changed by the owner. It requires a Jeweler's wrench. Said wrench has prongs that fit into the 6 indentations on the back of the watch. The wrench is than used to unscrew the back plate, exposing the battery. Any reputable jewelry store will have one.