Benson Watch Winder Smart-Tech II 4.18.B Black 70048-110.11. Benson watchwinders are essential accessories for automatic watches. A watchwinder provides the watch of energy, prevents wear, ensures optimum oil circulation and is a perfect storage method for your watches. We produce the Benson Watchwinders in house. This means that we optimally focus on the design, materials, technical innovations and finishing which leads to quality products. The words quality, innovation and craftsmanship do stand for our watchwinders.