The manual wind Zenith Caliber 5011 (also known as the 5011K in the limited edition Zenith Type 20 pictured above) has 19 jewels, 18,000 VpH, with a 48 hour power reserve. It took 134 components to build this massive pocket watch movement, measuring in at about 50mm diameter and 10mm thick! The beats are standard stuff for old time pocket watches being transformed to wrist wear.
Slapped with a COSC certification, it’s an accurate timepiece to say the least, and that can be expected given the size. In fact, Zenith considers this to be one of the most accurate production movements ever made. This caliber was originally produced in the 1960’s, and is still used in precision timing instruments to this day.