Cuervo y Sobrinos Watch Historiador Squelette 3191.1NSQS. The Cuervo y Sobrinos watches Historiador Squelette brings the timeless aesthetic appeal of skeleton watches to the Historiador collection. This model partially displays various movement parts to satisfy the wearers curiosity about the automatic mechanisms tirelessly working beneath the dial.  To this day, the design of this openworked model continues to attract admiring glances with its allure undiminished, despite changing fashions.