You are going to have to remove the battery to find out which one you need. For instructions on how to do this see: http://www.mademan.com/mm/fossil-watch-battery-replacement-guide.html. You can buy the battery at: http://shop.batterymart.com/search#w=fossil%20ch2599%20watch%20battery. Replacing a Fossil battery is delicate and tricky. Fossil recommends that you send it to a shop that specializes in Fossil watch battery replacements.
I have a Fossil and a Nixon watch that have very similar backs. Usually when it has those grooves all the way around, the back just screws off. I know they make some special tools to twist it, but I had luck with gently using some needle nose plyers.
Hope that helps and good luck.
mcdevito75 here, Without seeing the watch it"s hard to tell, but I would figure the clasp could be repaired, but the cost may equal a new band and clasp. Look for a small watch repair shop in your area and compare repair cost of the clasp with that of a new band.
Ummmm... what kind of watch is it? Please say more, like, Brand name on the dial. If you can open it, the name on the movement inside. Anything else written on the dial. Useful information when trying to answer questions like this.
Jerry, If its smooth on the back cover, you have to pry it off carefully. Get a magnifying glass and look around the cover edge, there should be a small under cut. Pry at this point with a penknife blade or similar. If the cover has 6 or 8 small indentations in it then it likely unscrews but you may still need to see a watch shop for the tool to unscrew it.
Fossil watches have a 2 year warranty so if its inside this, take it to a dealer.
I have no idea what type, ...but having just replaced a battery for that exact watch, you have 2 options:
1.) Mail it into Fossil (cost is $18.50) you can download & print repair form here:
http://www.fossil.com/attachments/en_US/watch_repair_form.pdf
2) Physically take it into any Fossil store in US or CANADA where they can do it there on site, for $10.00 even.
Hope that helps! ;)
put as much info as you can into the yahoo search,,i found it to be hair pulling,but its their it took me 5 days to get one for an antique oven I got,,, if not,send me more info or post it here,,ill do my best to find it for you.