This stainless steel watch band tool will help you get those little spring bars in and out of your watch casing. If you just shot a spring bar across the room and lost it in the carpet, you can buy more here.
“The spade tool is quite useful, but the metal is quite brittle. With repeated use, one or the other prongs break off. The other end, meant to depress the spring bar through lug holes is useless, for the same reason. Any amount of side torque will cause it to snap off.”