Swiss design, 1970s production. Square format: 97 × 97 × 39 cm. Construction: Solid base structure clad entirely in cognac-brown leather. Top surface in smoked grey mirror glass. Condition: Excellent. Leather shows appropriate surface wear—creasing, minor color variation—consistent with five decades of use. Glass intact, no significant deterioration. Manufacturer Context: de Sede AG, Klingnau (Switzerland), established 1965. The company's production methodology emphasized handcrafted leather application and structural durability. This period represents their mature design language, characterized by volumetric bases paired with refined proportions. Materials: Leather (primary), mirrored glass, internal frame structure (likely beech or similar). Functional modernist design. Documentation of manufacturing quality from the Swiss furniture industry at its technical peak. I have official proof of authenticity such as vintage catalogs, designer records, or other literature sources and take full responsibility for any authenticity issues arising from misattribution