I wish I could help. Whenever I see GF clocks today they all look like the same, generic movement in a big pretty box.
And all I can do is lament that we lost the GF clock that my GF had. With the Westminster brass gongs and the moon dial. This thing was pushing 7-8 feet tall, and had huge weights to drive it.
What few I've see of todays just remind me of all those other modern battery powered clocks that have a generic black clock movement in the back that takes a AA battery and uses a small dial to set it. Something you can buy at Michaels for $4.
That's just how I feel about the movements. They have these little metal chimes, etc.
In contrast to a weighted pendulum, 4 feet long that just leisurely swayed back and forth. Tick...Tock...
It also helped that my GF was a clock nut. He built several clocks out of wood, so while we never discussed it per se, I have no doubt that this was a high quality clock.
But we lost it after he passed, and my father moved away, and the house basically sat unattended and got looted.
It was a dominant force in the house with the gongs and persistent tick.
THAT's my standard for a GF clock, and what I've seen in mall stores and what not just don't match it.