The Otero 237 is a manual wind 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 the Otero 237 may vary from the Ebel 8.75''' model. Differences between the Otero 237 and other movements such as the 158, 159, 185, 212, 220, 238, 246, 251, 259, 261, and 277 are not known. The Otero 237 movement was commonly used in watches around 1925.