flat mid-century Soviet book and magazine cartoon line art, uniform bold felt-pen contour, clean white paper skin with no tonal hatching, shading only as solid black fills and parallel stripe hatching on clothing, vast white background, two naval officers of 30 and 35 in sailor uniforms and caps standing on either side of a large rectangular locked chest with prominent lock, one bent forward pointing at it, clean thick contour, flat two-dimensional cartoon with uniform contour and untouched white paper, no cross-hatching no engraving no realistic modeling, no children in frame, military curiosity mood <lora:training_7185876-20260927070815457-09s0:1>