Dear Folks, Thanks for your help in advance. I would like to share my latest 400 day Clock , i obtained it from a merchant in Cairo with rare condition as in PIC's. I want to confirm it is Kienzle clock and the date of manufacturing from the serial no#. I want also to confirm when maintenance is needed for it. Also what value you think it worth. And finally i saw that post: Kienzle 400 day clock But the watch is little bit different. Can you assist plz.