A light-skinned human forearm is depicted vertically, featuring a circular red ink stamp on its inner surface

A light-skinned human forearm is depicted vertically, featuring a circular red ink stamp on its inner surface. The stamp design includes the word "BERLIN" in capital letters beneath a stylized architectural or building motif. The background consists of a dark, textured ground surface composed of irregular paving stones or cobblestones. The stamp indicates an association with Café Berlín Club, located at Calle Costanilla de los Ángeles, 15, 28013 Madrid, Spain.