The image is a detailed sketch on paper, likely from an artist's sketchbook given the visible spiral binding on the left

The image is a detailed sketch on paper, likely from an artist's sketchbook given the visible spiral binding on the left. The central subject is a lightbulb, drawn with cross-hatching to indicate shading, giving it a somewhat vintage or industrial feel. Inside the lightbulb, a miniature scene unfolds: a sailing ship is depicted on choppy waters, with waves rendered using wavy lines. Below the ship, a coiled serpent or dragon is sketched, its body twisting and turning within the confines of the lightbulb's glass. Several small birds are drawn in the water inside the lightbulb, and two are visible in the air outside and to the left of the bulb. Outside the lightbulb, to the right, two moths or butterflies are drawn in flight. One is smaller and more distant, while the other is larger and closer, with detailed wing patterns. To the bottom left of the lightbulb, another moth or butterfly is depicted. The overall style is monochromatic, using black pencil or ink. The paper surface appears textured, and there's a subtle shadow cast on it, suggesting the drawing is lit from above and to the right. In the bottom right corner of the paper, the number "01" is faintly visible. The sketch does not contain any elements that would place it in Kostenets, Bulgaria, or any specific city.