Its time to watch out the creative clock Designs at incredible snaps. According to me clock is one of best and great inventions of human. Clock is the oldest invention. We can come across different models of clocks starting from ancient period to present day. Some of the models attract us very much like cuckoo clocks, astronomical clocks and water clocks etc. Cuckoo clock is one of the most popular clocks and it is manufactured in Germany. Some of the cuckoo clocks are handmade. The first cuckoo clock was made in black forest Germany. The Swiss company Parmigiani Fleurier made the worlds first mechanical clock. It is based on Islamic lunar calendar. Here i listed some of models of clocks hope you all love it.