Does any one know where I could buy a moon phase clock? I have seen a couple on the web but can't find anyone here who even knows what i'm talking about, let alone advise where I might find one. I would like to hang on on the wall in my study as it seems like a useful & novel instrument to me. I dont know why people are so baffled by my request. Presumably the hand would turn one revolution every 29 1/2 days or there abouts. maybe I'm wrong. Any way, any ideas?