I have attached photos of a grandfather's clock, reputedly German, that was purchased by my great-grandfather as an antique in about 1920. The clock ran until my father moved to Florida from VA in 2014. He was not able to find a repair specialist prior to his untimely death a few months ago. Please help me to identify the manufacturer and any other salient details regarding the clock that may influence its valuation. How old is it, most likely (I've heard a wide range of dates from "experts")? Is this a 30 hour, 8 day, one/three/six/12 month rewind time clock? It has five tubes, which seems to be significant. How do I determine how many clock motions it has, and is that significant? Thanks in advance for your help.