The Ulysse Nardin Blast ref: 1723-400/00 features a 45mm titanium case with a transparent skeleton dial. This timepiece is powered by automatic winding and is equipped with the UN-172 movement. The design showcases intricate details through its skeletonized structure, allowing for a clear view of the inner workings. The combination of materials and engineering reflects a modern approach to watchmaking, making it a notable addition to any collection.