Clock fit ups save time for clockmakers who intend to build high quality wrist watches without needing to select parts from scratch and also assemble them. Clock fit ups are likewise called inserts, and also the terms describe a manufacturer-preassembled unit that obtains pushed well into a hole that is normally drilled in some type of situation. This technique is specifically eye-catching if one intends the frame to be the centerpiece rather than the wrist watch itself. https://www.clockparts.com/clock-hands/