HOW DO YOU OPEN CASE ? - Geneva Designer Fashion Jacob Style Watch

1

Determine the type of case back on the watch. Set the watch face down on a soft surface and look at the back. If it has slots, it is defined as a screw-back case. If it is smooth, it is defined as a snap-back case.
2

To open a screw-back watch, use the metal blade of a standard screwdriver to turn the slots counterclockwise. A case-back wrench, which can be purchased at watch-repair stores, can also be used. Set the metal tips of the wrench into the back's slots and turn it counterclockwise to open.
3

For a snap back case, place the metal blade of a standard screwdriver in the indent between the watch and the case. Gently apply pressure to lift the case up and off of the watch.
4

Close the case back by setting it back onto the watch. For snap-back cases, line up the indent on the side of the watch and press gently on the case back to close. For screw-back cases, use the screwdriver blade or case-back wrench to turn the slots clockwise, thereby closing the case shut.

mcdevito75 here, Besides a ledge to pry open, some watches have a cutout in the cover that matches the case itself, very hard to see, it should look like a 1/2 moon cutout in the cover and case.

Pull out the crown. Now try to pull out it more, just don't do too hard. If the stem does not come out, there is the way you can open the watch - if it does not, then you have a monoblock case and it can be opened by the special pump only. In case if you can not pull the stem out, take an eyeglass and examine case back all the way around the case. You have to see the tiny groove. This is the place where to insert the openers blade and pry it .
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You definitely need special Rolex case back opener. Without it your watch will be locked forever. Rolex cases are so tight, that even when special opener is used, you will need quite strong arms to open it. Rolex case openers sometimes sells on ebay, but they are never cheap.

1)Unscrew the crown until it pops out, the same way you would unscrew the crown to change the time on the watch.
2)Place the watch case opener in the notches around the outside of the back of the watch case. You have to use a watch case opener made for Rolex watches to open the watch. Once the case opener is in place, twist it and the back will pop open.
3)Use a mini screwdriver to loosen a tiny screw on the inside of the watch located near the stem. You do not need to unscrew fully--only loosen it.
4)Pull the crown straight out. The crown and stem should come out easily.
To open the back of the watch
1)Purchase a Rolex watch back opener set, if you do not already have one. This set is able to open and close any size of Rolex case.
2)Match the size of your Rolex case with the same size of grooved metal die from the tool set.
3)Put the metal die on the grooves on the back of the watch case.
4)Turn the die to remove the case.
5)Remove the rubber gasket.
This will help. Thanks please keep updated.please do rate the solution positively .thank you for using fixya

They are somewhat tough to get open. You really need a specail tool for a Rolex to avoid damage or scratching of the case back as you must unscrew the case back. I suggest you have some one do this for you that has the tool, Why mess up a really nice timepiece!

open the bonnet. Look where the Clutch & Brake Oil Pan is. Right under this on Engine there is a black plastic round shaped with fuel pipes for inlet and outlet. Remove the car battery from tray (you need rachet with long beck to open bolt). From this side have a look and you'll find a bolt (need star key screw driver) open this bolt remove inlet and outlet pipes by pressing the button like lockheads on these pipe ends and pulling outside and the power adapter plug below the filter.Pull the filter ( you might be needed to remove turbo air filter case and pipes in case if the filter is stucked with a leg in the engine bracket). Here is your Diesel Filter in your hands. Took me about two hours for replacing the filter.

Its like a clasp just use a knife an open it at back case you can groove where you placed the knife tip.

Hope it may helps:

That means you have a monoblock case and this can be opened using a special pump and forcing the air into the case through the tube (where the stem is inserted into the movement).
When forced in, the air pressure builds up in the case and lifts up the watch glass.
It is quite tricky operation and need skilled watchmakers hands and tools.
When I first used this metod, air pressure was so strong, that it shot out the glass from the case together with the movement and all the watch bits flew over the place, ending with damaged fingers, scratched dial and broken balance staff, so, I had to buy them and replace.
My advice is to go to your nearest watch repair shop and ask for help, as you wont be able to open your watch without proper tools or you will damage or brake watch glass.

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An authentic Rolex will have a screw down back with exactly 144 small teeth. You can only open a Rolex case with a special Rolex tool (Key). We use the Bergeon hand wrench to open Rolex cases. Supplied with 6 Bergeon grooved chucks(18.50, 20.20, 22.50, 26.50, 28.30 and 29.50 mm), these are the same chuck used in the Bergeon 5700RO and will fit in the Bergeon Bit Adpater for 5700-Z Case Opener our number FB-231. Replacement chucks and replacement handle are available in case you have a set that is missing a piece. As is the case with any fine mechanical instrument, special tools are required in order to properly service and adjust a precision instrument such as a fine timepiece. If you are not experienced, it is better to leave this to a Certified Rolex tech. If you do feel you want to proceed, this tool will set you back about $140.00 or so. Just as the internal parts of the Rolex are exact, so is the watch case that protect the valuable watch movement. These tools are used to open the Rolex case without causing expensive damage. You can call Bob Frei at 510-832-0355 ext. 2 from 11 AM to 5 PM Pacific Time Zone, to order one if you wish, or several other sellers of these fine tools can be found by doing a little research on the net. Hope this has helped you.