Discover A. Lange & Söhne's precision with the Zeitwerk (ref. 140.021), a contemporary classic shaped by careful watchmaking know-how. The exterior is thoughtfully executed: crafted in yellow gold and measuring 41.9 mm in diameter, with a thickness of 12.6 mm. The caseback is open, and the crystal is sapphire. At a glance, the dial balances texture and clarity: a champagne tone, executed in silver, framed by arabic numerals hour markers. At its heart beats a proven engine: the L043.1 caliber. Introduced in 20092013. 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.