The Unitas 150 watch movement, produced between 1894 and 1931, features a hunter calibre mechanism with a bimetallic screw balance and Breguet hairspring. In the entry grades, it incorporates a brass escape wheel, while the higher grades utilize a steel escape wheel. The balance is equipped with four adjustment screws, and the minute wheel or complete train is made of pink gold. The movement boasts a negative stem mechanism, allowing for easy switching to winding by pulling a hook near the stem. It is designed with a right-handed crown-wheel screw. This pocket watch movement exhibits the following functions: stem wind and set, sub second display, and it is manufactured in the United States.