I have added some videos of the movements in operation to the main article on the 89ST series of stopwatches. I have also included a short slow motion section to make it easier to see the movements. You will note that the 890C when slowed down to 5% of normal speed is still at 18,000 bph, the same speed as the 890A operating normally.
The main article can be found here - 89ST Series Stopwatches - Olympic Sports Timers
If you have already seen the main article below are just the videos that have been added.