拍品專文
Most likely made in Germany, the movement of the present watch employs a so-called stackfreed, a simple spring-loaded cam mechanism used in some of the earliest spring-driven watches, devised to even out the force of the mainspring and to improve timekeeping accuracy. Stackfreeds were predominantly used in clocks and watches made in Germany from the 16th to the 17th century, before being replaced by the fusée. The term may have been derived from the German expressions "stark" for strong and "Feder" for spring.