No slot or screw to remove watch back

Looking at pictures of the watch , you will need to remove one side of the strap by undoing the screws on the side of the strap.
once you have removed one side of the strap unscrew the four screws on the case back of the watch.
then you will be able to lift the case back of the watch , it has a rubber seal on it which you need to carefull not to break.
Good luck and be carefull.

Turn the watch over and you will see that the band is attached to the watch with spring loaded pins. There is room to put a spring removal tool in the available slot and depress the spring which will allow you to twist the band away from the watch. Be careful to not loose the spring loaded pin as you may need it to install another band. Almost every watch uses this method of band removal. Those that don't usually have a long screw that is accessible from the side of the watch.

The arrows show you the direction to push out the pins.

Look for an arrow on the inside of your watch band. The direction the arrow is pointing is the direction the pin should slide out of the band. If your pin is screwed in, you may not see an arrow on the inside of your band.

2 Look on the edge of the watch band for a small round object, the pin. If the pin head is flat, then it needs to be pushed out. If the pin head has a screw driver groove, then it needs to be screwed out. Depending on the type of watch pin you have, take a sharp pointed tool or a tiny screw driver from a hobby kit or watch tool kit and place it on the head of the pin. You should be looking at the end of the pin on the opposite side from where the arrow is pointing.

3 Push on the sharp tool to push the pin out of the watch band. You will need to use force to push the pin out. If your pin is screwed in, gently unscrew the pin until it becomes loose. Remove the pin with your fingertips. Make sure to put the pin in a safe place, because you will need it again when resizing the watch band.

Sometimes the split ends of pins look like screws. If the slot is extremely thin its a pin A screw slot will be a bit wider. I pin removal toll inserted into the smaller end should do the trick.

grab one with your teeth and the other with the johnson rod that came with it.

First you need to determine if the watch is a snap back type or a screw back. If the watch back has a series of equally spaced slots (usually about 6) around it's perimeter, then it is a screw back and you will need a special tool in most cases. You can sometimes remove a screw back using a pair of snipe nose pliers in two of the slots, but unless the watch can be mounted safely in a small vice then this is quite difficult. The back from snap back watches can be removed with a blunt pen knife. If you look carefully around the edge of the watch casing you should see a small indent in the cover. This is where you start with the blunt pen knife, working your way around the edge twisting the knife gently as you go. Eventually the back will snap out of the watch casing

Just click below for more information;

http://www.pmwf.com/Watches/WatchSchool/WS%2011%20How%20to%20remove%20and%20replace%20a%20watch%20movement/WS%2011%20How%20to%20remove%20and%20replace%20a%20movt.htm


a youtube video guide sample on how to;


http://www.youtube.com/watch?v=ZMLZNclIcME&feature=related

Hope this may help you;

Regards,
VOTIT

DON’T FORGET TO RATE;

Bands are held to the watch body by springpins. To disengage them, I use a fine blade knife, and pull one end of the pin down by causing the blade to bite into the metal of the pin, between the eye of the band and the watch body. This method will work when dealing with leather straps, perhaps not with a metal band, depending on how much clearance there is between the watch fork and the band's eye.
If there is no clearance, it may be necessary to destroy the springpin to get the band free. Replacement pins can be purchased at a watch repairer.
Replacing batteries: You need the back off. Some screw on, most press in. Press- ins can usually be released with a knife blade, or small leverage device if there is a specific release place on the rear cover. On odd occasions, it becomes necessary to "use a hammer and chisel". Not easy.
Screw- off backs need a tool to engage the slots on the rear. Sometimes can be done with a pair of long- nose pliers.
The backs often have a fine rubber sealing ring, for water resistance.This needs to be put back in place carefully.
The batteries are held in place by various means, spring tension, clamping etc. Sometimes a screw or two must be loosened to free the battery.
Really, it is all a job for the experienced.
I only do work on my own and other family member's watches. I have a range of tools I have made for these. I wouldn't risk doing outsiders' watches. I do bands and batteries, but leave it at that.

The plastic wrist band doesn't have to be cut away. You need to dislodge the spring-loaded end of the pin from the hole in the plastic with the blade of a sharp thin knife.

The you proceed to lift one of the 4 snaps to open the cover. The battery is under a white translucent inside cover.

The original battery was Sony SR621SW.

Pay attention to the rubber seal ring when putting the watch back together.