Assembly. Each train is assembled and tested in sequence. The remontoire which is set within it's own four column structure had to be re-assembled in exact reverse order from disassembly. The many photos and the computer at the bench was very helpful toward this end. Notice the more copper colored frame in contrast to the yellow brass of the strike barrel cap (3). This is more like the actual colors of the metal. The fluorescent lighting as well as the camera flash tends to distort colors. The clock did not have a dome and one was ordered out of Germany. Some slight alterations to the groove on the base was still necessary to achieve a proper fit.