The Cartier Santos ref: WHSA0009 features a stainless steel case with a transparent skeleton dial. This model, introduced in 2019, is powered by a manual winding movement, specifically the 9612 MC. The case measures 40mm, providing a balanced presence on the wrist. The skeleton design allows for a view of the intricate movement, showcasing the inner workings of the watch. This piece combines modern aesthetics with traditional watchmaking techniques, making it a notable addition to any collection.