Tattoo line art sketch: a skull in a tilted Russian Marine beret, shown in a 3/4 profile with a slight forward lean as if moving into action. Thin, consistent black lines; key features (eye sockets, nasal cavity) are negative space. The beret’s emblem is simplified to a geometric shape, keeping the design legible at small size. Vertical layout for ribs, ~11 cm height. Style: modern line work, no fill, no greyscale, strong silhouette.