The A Michel 522 is a manual wind mechanical watch movement with a sub-second function. It features a bimetallic screw balance and a stem mechanism without a setting-lever spring. The bridge shapes of this movement may differ from the Ebel 8.75''', but specific differences are not known. The A Michel 522 movement was likely produced around 1925, and it belongs to a series of movements with various designations, including the 158, 159, 185, 208, 212, 220, 238, 251, 259, 261, and 277.