Many years ago (mid-2000's) I had the pleasure of hosting a well known Swiss luxury watch brand's colleagues at the RFID lab we had built as part of testing RFID in pharmaceuticals for track and trace.
The company was interested in evaluating RFID as a means to detect fake watches, very high quality fakes I might add, instantly, and refuse them for service. NFC wasn't really a thing at the time but High Frequency (HF) was because the tags could be super small and easily embedded in the watch case. There was even suggestions that you could use one of the watch hands to act as an antenna for the IC chip required inside an RFID tag.
I was wondering if any of you have come across known examples, or seen a watch repair person use a reader to authenticate a watch for repair or sale? I'm not looking for web references...there are plenty of those "proposing" such things and the regular scare-mongering about unauthorized surveillance (which I might is quite possible, but not particularly useful yet in mass as mobile devices have surpassed RFID's capabilities to let others spy on us).