A rosy-cheeked toddler in a red hat, blue polka-dot bow tie, and lederhosen-style shorts sits astride a plump green Rucksack (backpack) on an Alpine hillside, pouring from a thermos with an air of supreme self-satisfaction — the caption reads "Gruß aus Heidelberg / Viel schöne Dinge gibt es hier, / mein Rucksack wird es zeigen Dir" (Greetings from Heidelberg / Many beautiful things are here, / my backpack will show them to you). True to the promise, the Rucksack's flap opens to reveal a concertina strip of miniature photographic views of Heidelberg's streets and historic buildings. The "Gruss aus" (Greetings from) genre was the dominant German souvenir postcard format for decades, and this charming inter-war example adds a novelty dimension — the physical, openable pack — that would have delighted any child or adult receiving it from a friend holidaying in the famous university town.