WatchTech

The article begins by claiming that "The VMF 6710 is the most sophisticated chronograph produced today (2018), with conventional time and chronograph indications." After spending hours carefully analyzing the structure of the movement, I believe I now have a good understanding of its working mechanism. The structure is indeed logical and efficient. In fact, I even feel confident that I could disassemble and reassemble it myself (though I shouldn't). However, there is one aspect that has been confusing me for several days, and I'm hoping to get an expert opinion on it.

Specifically, it's related to the hour recorder clutch wheel:

In the mechanism, the silver part directly connects to the chronograph hours wheel, while the golden part connects to the spring barrel. Here are some images for reference:

My concern is this: once the brake is applied to the chronograph system, the silver arms of the hour clutch wheel will continue to rub against the golden wheel. I understand that, since the hour wheel moves slowly, the friction is relatively minor. However, there is still additional friction being introduced into the movement, and this friction seems to be intentional. Without it, the chronograph hour wheel would not function properly.

This brings me to my question: is such a clutch system a common solution in watchmaking?