I’ve never seen this style of 400 day clock before. The case has a painted black finish made to simulate hammered cast iron.
The movement is a regular Kundo miniature 400 day clock movement. One of my joys as a clock repairer is seeing all these wonderful types of clocks.
Job 5784. Besides the usual disassembly, cleaning and pivot polishing, I smoothed the ratchet gear, replaced the barrel arbor and installed a new suspension spring.