This Dual Action Pendulum Movement allows a clock to sway back and forth from the top and bottom of the movement. The duck clock shown would show the head and feet moving with the ticking of the clock. The movement can also be used with a pendulum rod (#1009768) and bobs (#1009795, 1009802, 1009811), each sold separately. The movement also includes specifications for creating pendulum of your own design. Allows selection of Group B sweep second hands. Maximum weight allowed on lower pendulum is approximately 1 ounce. Maximum weight allowed on the upper pendulum is approximately 3/4 ounce.