Engraved stamp of A mighty oak tree, a tropical palm, a cat sitting on a windowsill, a wise owl with big round eyes, a fox in an autumn forest

engraved postage stamp illustration, fine parallel line hatching, classic currency engraving style, detailed stippling and cross-hatching, monochrome steel blue ink on cream paper, perforated serrated stamp edges, formal composition, intricate fine lines, banknote illustration quality, square format, stamp fills the entire image, NO padding outside stamp edges, NO background frame, ONLY the stamp visible. Subject: A mighty oak tree, a tropical palm, a cat sitting on a windowsill, a wise owl with big round eyes, a fox in an autumn forest. No text, no words, no letters, no numbers. The stamp fills the entire image with NO outer padding or frame - ONLY the stamp itself visible, NOTHING else.