Stopped by CC's TB hotel in Gribblehirst Park today, again, to discover some trackables and drop in one of mine. This was one of the ones I saw - thank you for sending it out!
At the time I thought this was unusual because (without giving the full tracking code away) the tracking code starts with GC, just like the code for a geocache. And actually there is a geocache with the same ID code as this trackable. That could get really confusing, although the geocache has been archived, so I guess it's okay.