Discover MB&F's precision with the Horological Machines (ref. 91.SWL.RG), a contemporary classic shaped by careful watchmaking know-how. The exterior is thoughtfully executed: measuring 47 mm in diameter, with a thickness of 23 mm, defined by a round silhouette. The caseback is open, and the crystal is sapphire, delivering water resistance to 3000 meters. At a glance, the dial balances texture and clarity: a see-through tone, framed by mixed hour markers, and dauphine hands. At its heart beats a proven engine: the HM9 caliber. Issued as a limited edition, appealing to focused collectors. Initial production year: 2021. With considered ergonomics, it feels composed during extended wear. Brushed and polished elements play with light to emphasize crisp geometry. For buyers researching specifications and real-world impressions, this reference stands out for coherent design, dependable mechanics, and lasting relevance within modern horology.