Just a quick picture of an old Slava split-time stopwatch that my wife bought for me from a small shop in Bishkek, Kyrgyzstan while we were stationed there. The watch allows you to track two events. The left hand button stops or synchronizes the red hand with the black hand. The middle control winds the watch or depresses to start and stop the entire movement. The right button resets the black hand (as well as the red if the red is tracking with it).

It's a neat old watch and it is accurate enough for my timing purposes. The dial is incremented to time 30 seconds and the subdial will time up to 30 minutes. Although the watch has split-seconds, it does not have split minutes so you can only compare the two events if they are off by less than 30 seconds.