Hello I have a KC3814 automatic watch. It appears that the large silver mechanism in the back gets stuck and prevents the other gears from moving. The watch was purchased in July 2009. The watch just stopped working. Some screw may have come loose inside

This watch is kinetic, in that a moving rotor inside the watch powers a rechargeable battery that runs the quartz mechanism. You should not need to attempt to open the watch! It may be that the battery is flat (especially if it's not been worn for a while) - you can try swinging the watch back and forth to charge it (check online for charging instructions for Seiko or Pulsar kinetic watches). If that fails, take it to a reputable establishment for repair.

See https://www.fossil.com/content/dam/fossil/PDF/watchinstructions/Fossil_Watch_Instructions_EN_US.pdf

The file is a compendium of instructions for a large number of Fossil movements, but it is unclertain which movements the model CH-2331 and CH-2698 watches use. However, movement OS10 (page 15) appears to be the only one that matches the dial layout, button layout and also has a date window as the CH-2331. The watch has a quartz analog mechanism and uses one SR927W 1.55-volt silver oxide button cell. Silver oxide cells have low current output, but very long shelf life, so if the stem is pulled out completely when the watch isn't being worn, the battery could last many years. Scan the instructions to match up the CH-2698 with a movement number. A good guess from examining photos of the face of a CH-2698 watch would be movements OS20 / FS00 or VD53.

Hello, a week ago the small second hand (not long chrono second hand) got stucked and my irony swatch just stop moving. Although the chronometer could be running if started... The small hand just didn't move.
I tried different tricks, like removing battery, pull out main wheel and use chrono buttons to reset arms. Etc.
Today I noticed that when turning the wheel backwards a couple of times (one or two hours back) the little hand moved one second back... Pushing wheel back to On possition made the small hand move forward one second and get stucked again.
Then I did this procedure a couple of times, at some point I turned the wheel back for a while (may be 5 full turns) and noticed the small hand moved more than one second (5, 10, 15 seconds backward)... when I noticed it was moving freely I pushed wheel to on position and noticed the small second hand was running normal.. I hope it works for some of you. Greettings from Canada

If you have a Fossil FS4337 Chronograph, shaking the watch shouldn't be doing anything other than exercising your muscles; the movement is a battery-driven quartz movement whose movement is controlled only by whether the stem has been pulled out (stopping the movement and saving power) or whether the battery still has enough power to activate the stepping motors that move the watch hands. Based on the symptoms that you've described, I would suggest that it's probably time to change your watch battery.

Often, when a watch battery is running low but isn't completely dead, pulling the stem into time-setting mode will stop the movement and permit the battery to "rest," giving it (briefly) a bit more reserve amperage to put out when you push the stem back in. That's how you can sometimes get a quartz watch to run for a few minutes after the battery appears to be dead. That may also be why your watch has started running again after you've set the time and date.

Fossil analog quartz watches tend to use silver oxide (usually #377 or #379) batteries instead of longer-lasting lithium batteries. In ordinary use, I would expect a silver oxide battery to provide between 1 and 2 years of service before it needs to be replaced. I can't remember if Fossil chronographs (which also use quartz movements) use a silver oxide or lithium battery. Lithium batteries often provide an additional year or two of service in analog watches, compared to silver oxide cells; digital watches using them supposedly may last as long as 10 years with a lithium battery, assuming you don't use the backlight or audible alarm functions. Note, however, that these batteries are different sizes and different voltages, so you can't substitute one for the other.

Finally, none of this advice applies if you have a Fossil watch with a true mechanical movement in it. In that case, gently shaking the watch may spin the winding rotor enough to start the watch back up again. However, an even faster way of winding those watches is to use the winding / time set crown to wind the mainspring directly instead of relying on the geared-down action of the winding rotor. Automatic watches can bind up if they are not used for a period of time; the lubricating oil used in some of the pivots can harden--or at least provide enough resistance that the movement may require more initial force to start running than to continue running. That behavior usually indicates that it's time to have the mechanical movement cleaned and re-lubricated.

If the second hand of your watch isn't moving, but the watch is otherwise keeping time, you most likely have one of two problems. The simpler to fix problem is that the second hand might have come loose from the post onto which it's been fitted. It's a simple friction fit, and a watch technician would simply remove the watch movement from the case and very (very!) gently push down on the seconds hand to re-seat it. If that's the problem, that's all there is to the repair.

A second potential cause for this behavior could be that a speck of dust or crud has gotten into the gears that operate the seconds hand, preventing it from moving. This can easily happen when changing a battery--many watches tend to get somewhat of a buildup of crud where the watch back meets the case. Especially with screw back cases, the process of loosening the back also loosens the crud layer, making it easy for little bits to fall in. If you do have crud in your movement, you're a bit limited in what you can do. Unlike old-time mechanical movements, very few quartz movements are made to be disassembled and cleaned. Instead, a watch repairer may be able to blow some air (not compressed air from a can--that will probably wreck your movement) to try to clear the gears. If that doesn't work, there is a little device that some watchmakers have that runs your watch at about 50 time as fast as normal. Spinning the gears like that can sometimes generate enough force to clear a blocked gear train. I have done this to resurrect several watches whose hands were stuck. However, I was still able to see the "pulse" of the second hand on those watches, even if the hand itself never moved forward.

With a watch of this age (assuming that it has been well used), it is likely that there is terminal were on the gears.

If you look closely at the mechanism when it has stopped, I would expect to seen a tooth that is more worn than the ones either side of it, causing the adjacent gear to miss engagement.

Comparison of teeth my be subjective, as I would expect many of the teeth to be showing wear.

I suspect that the only long term solution is a complete overhaul, if Accutron have the appropriate parts still in production.

mcdevito75 here, Sounds like your Guess watch neds some service, cleaning, oil etc. You can check with the repairservice directory right here at fixya, bottom of this page click on repair service directory then watches.

mcdevito75 here, BMW watch, nice watch, Actually there are 2 ways to start winding an automatic or self wind watch. Since you feel no resistance in the winder (crown) which if you did, would mean the automatic mechanism is attached by gear to the mainspring and winding the crown (stem) would start the winding process. Without any resistance winding the crown, your automatic mechanism is free-lance as a way of saying, in your watch which simply means your BMW watch winds solely on wrist / arm motion. First, make sure you hear the automatic mechanism moveing inside the watch when you move the watch in almost any direction, now simply hold the watch in your hand and with a rocking motion, say from 12--to 6 rock your hand back and forth for about 30 seconds. You can also make circular motions with the watch in your hand for 30 seconds, any motion that will cause the automatic movement in your watch to move will, start the winding process. After you see you watch has started, simply wear your watch to keep it wound.

I presume they told you on E-Bay that the watch ran ok. If it was mis-representitive that's another story that you probably have some recourse through E-Bay to return and get you money back. If you are stuck with the watch, then it may just need a good cleaning by a reputible watch maker/repairperson. You can also purchase some rather inexpensive watch winding machines to keep the watch wound if you don't wear it all the time. Hope you get it working, Good Luck

I have found that some of these "automatic" Fossils also contain a battery. That is how that provide an automatic watch at such a cheap price. I recommend taking it to a jeweler to have them check this. If it needs repair it will likely cost near the watche's replacement value.