Experience the craft of MB&F in the Horological Machines (ref. 41.TSL.BDT), a refined timepiece that blends thoughtful design with reliable performance. A study in proportion and durability: measuring 54 mm in diameter, with a thickness of 24 mm, defined by a round silhouette. The caseback is open, and the crystal is sapphire. The dial composition is deliberate and legible: a black tone, framed by arabic numerals hour markers, and proprietary hands. Beneath the caseback lies dependable performance: the HM4 caliber. Produced in limited numbers, appealing to focused collectors. First released in 20112013. Comfort and balance define the wearing experience, making it an easy daily companion. Subtle transitions between textures elevate the overall impression. For buyers researching specifications and real-world impressions, this reference stands out for coherent design, dependable mechanics, and lasting relevance within modern horology.