It may be my 60 year old eyes, but the running seconds on the Speedy sub-seconds dial seems to have a very smooth running rhythm. I hardly see the “tick tock” motion that I see on other watches with a higher beat rate. I have an Omega f300 electric watch and it reminds me of the smooth motion on that watch. It could just be that it’s less noticeable on a sub-dial than on a central seconds dial. Just an observation. 