Hi Anne,
Many thanks - I did try a search on "clock" first, that's how I came across the Higgins glass - fabulous!!!!
Maybe Pat will come back to that thread one day with more pictures, I hadn't considered the possibility of the box being Russian as I have no experience of Russian Glass (that I'm aware of!).
Still, the box might even shed some light on the clock. Will wait and see.
Kind regards
Cat