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.
“This was a bit of a disappointment frankly, the fork end is too thick to get between a strap edge and the lug, and the pin end bends very easily. The body of the tool is nice though, and it comes with spare tool ends, so I will rework one of them and see how that goes.”