5020B Watch Quartz Movement for Watch Movement Part Watch Repairing Watchmaker. Item Type: Watch Movement. Maximum length of movement: Approx. 40mm / 1.57in. 29mm / 1.14in. Battery Model: SR716SW (Included). Battery Type: Button battery. Quantity of Batteries: 1pcs. Purpose: Replacement of watch movement. 1 x Watch Movement. 1 x Plastic Storage Box. Open the back cover of the watch, take out the original movement, put in the new movement, close the back cover of the watch, and then replace it.