Is the year of the flat head case with long pull staff early?

Flat head case with a long pull staff early years, appeared in the Ming Dynasty period. According to the query related public information shows: flat head case with long pull staff is a traditional Chinese instrument, used to measure the length of the object. The flat head case is a flat measuring tool, and the long pull staff is a length measuring tool. According to the relevant information, the flat head case with long pull staff first appeared in the Ming Dynasty, when there was already a more mature production process and use. Before the Ming Dynasty, there were similar measuring tools in China, but the form and production process were different from the flat head case with long pull staff. Therefore, the flat head case with long pull staff year early, appeared in the Ming Dynasty period.