On the AiG website, they show the same picture of this clock mechanism encased in solid rock, along with sea shells. Of course, no one believes this clock mechanism was made millions of years ago. This clock mechanism was found in 1975 near a small jetty at Westport, Washington, an area that has suffered many shipwrecks.
It is obvious that the correct mixture of sand and other sedimentary substances hardened around this clock mechanism, making it appear like a clock that was fossilized in hard rock millions of years ago via strict uniformitarian processes. But being geologically anachronistic per uniformitarian assumptions, it is obviously an evidential, evolutionary "dud."
What's more important to point out is that there is really nothing spectacular or amazing about this clock at all, especially since these things have been and are being found throughout various parts of the world. But the average person, indoctrinated into the idea of slow uniformitarian processes taking millions and even billions of years of time doesn’t usually hear about these little beauties, and thus they go on thinking that rocks and fossils must take at least millions of years to form.