Emerging from a raw rock tunnel cut directly into the Alpine cliff face, a compact steam locomotive of the Brünig Railway fixes the viewer with its single headlamp eye as it bursts into mountain daylight above the glittering Brienzersee — one of the most dramatic viewpoints ever chosen for an early Swiss railway postcard. The hand-tinted chromolithograph renders the locomotive in deep blue-black, its cab windows luminous, while the surrounding limestone overhang glows amber and the forest-clad slopes below fade into a soft blue-green mountain haze. The Brünigbahn, opened in 1888 and running from Lucerne to Interlaken over the 1,002 m Brünig Pass, was Switzerland's first metre-gauge rack-and-pinion railway and became an instant tourist sensation; publisher Chr. Brennenstuhl of Meyringen (catalog no. 178) produced several dramatic locomotive-eye-view cards for the tourist trade, and this example — with its single-back "Nur für die Adresse" format indicating pre-1904 production — is among the earliest and most striking. The reverse carries the trilingual Swiss postal legend in green ink, consistent with the Weltpostverein/UPU undivided-back era before message space was permitted on the address side.