Clock Inserts

A non-ticking second hand is the by-product of using a continuous sweep clock motion, which not just does not jerk and also time out, yet also doesn't make an audio. The non-ticking second hand is much less preferred than one may expect, possibly because of the absence of certain desirable additional features, yet also maybe due to an easy lack of familiarity. Even so, the smooth and quiet shift is liked by some and also perfect for certain situations.

https://www.clockparts.com/clock-inserts-fit-ups/