Olivetti Divisumma poster — geometric mid‑century calculator ad

Graphic poster for the Olivetti Divisumma calculator featuring looping black ribbon forms filled with multi‑colored numbered blocks and arithmetic symbols,...

• olivetti
• divisumma
• calculator poster
• mid-century modern
• graphic design
• poster art
• geometric abstraction
• typographic logo
• bauhaus-inspired
• herbert bayer
• poster
• black ribbon shapes
• colored number tiles (blocks)
• checkerboard tiles (gray/white)
• arithmetic symbols (+ − × ÷ % : )
• divisumma wordmark
• olivetti logo
• designer signature (lower right)

Divisumma; olivetti; small numeric labels on colored blocks (e.g., 1–9); visible arithmetic symbols (+, −, ×, ÷, %); designer signature (lower right)