I bought a metal N. Muller clock last week and am looking for information. I was told it was iron and didn't work. The Patent No. is either 50 or 150 (if the later the "1" is almost worn off). It seems to have an Egyptian/Greek theme. Each side has a Grecian woman's head wearing a pharaoh's headdress. The face of the clock is paper. Apparently it had a decorative top which is now missing. It is missing a pendulum. There is some remaining paint (very faint) - bronze in some and gold in others (such as the headdress). The clock runs and chimes. A magnet doesn't stay, so maybe it's not iron? I appreciate any info people can provide.