Sorry Tom - just another 'senior moment' - one amongst many. Will edit and then check out the link.
Maggy - of course you would, that's why you have yours and I have mine.
You will have to wait for me to master gif animation to share the visual manifestation of the tick-tock I hear behind me. Content yourself with knowing that the pendulum is sometimes in that position when I forget to wind it.
As I said, this is a work in progress - among other things I have to model something I can plug the mantle radio into.
I'll get there - one day.