Octavo, dark blue cloth boards with gilt titling to the spine and upper cover, showing moderate handling wear commensurate with age, including minor edge rubbing and light surface marks. The interior pages are clean and well preserved, with the autograph prominently placed on the printed title page. The ink remains legible and stable, with balanced tonal contrast against the paper. The presentation is visually distinct due to the presence of both the full Albert Einstein signature and the handwritten formula "E = mc2", creating a clear display quality for collectors.