Most watch enthusiasts will mention the Omega Caliber 321 if you ask them which famous timepiece they would like to see again. This robust and elegant chronograph timepiece has been a favorite since the 1940s and a particularly popular collector's item all over the world. Now, more than 50 years after the last Caliber 321 was produced, OMEGA is relaunching the iconic timepiece. Renowned for its beautiful, complex design, the original Caliber 321 was the first timepiece to be built in the Omega Speedmaster in 1957. It had previously been used in a number of other Omega chronographs, rolex replica namely in the Seamaster collection. It is so special because of the "monobloc" column wheel that is produced from one piece of metal and gives the caliber extra technical value. Column wheel timepieces require particularly high precision in the design and manufacturing process, making them very popular among watch collectors.