I just repaired this Kundo 400 day clock with COPPER finish! This is only the second copper finish 400 day clock I’ve seen in over 28 years of full-time clock repairing.
The following parts are copper plated:
- Base;
- Pillars;
- Dial;
- Arch (decorative part above the dial);
- Pendulum balls and center piece.
Copper finish clock (left) compared to regular brass clock (right) 
The movement
If you have one of these copper clocks, DO NOT POLISH IT! The copper is a thin layer of metal over brass, and will come off.
Repair job 7741. Backplate number 1371. Suspension unit 1 with 0.0032 inch suspension spring.
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Many clock shops don’t like to work on these clocks, but I do. Details are on my website at: https://billsclockworks.com/repair/400Day.htm
So happy to see this clock. I inherited this Clock from my Dad. He bought in Germany in 1951 or 1952. The dome broke and it doesn’t work. Don’t have a key. Last time I saw it work was in the 1970’s. I would like to get it repaired (live in Georgia). Any suggestions?
I have one of these clocks. It doesn’t have a dome with it. I would like to wind it up but I can’t find where to insert the key. Do you have any idea the value of this clock?