I left a bid and was quite surprised to find I had won it for £130 including sale fees.
Although it looks a bit sad, it's all there and I now have it running perfectly - the whole movement is mounted on an inch thick slab of marble and runs on a single 1.5v battery. These clocks were so energy efficient the original battery, no longer available, was reputed to last for 5-7 years. I have it running on a single AA battery at the moment but when I restore it I will 3d print a replica of the original battery.



