An original Ferrari Gestione Sportiva full-scale factory engineering drawing for the crankshaft (Albero Motore) developed for the F105 Formula One engine, dated 3 November 1983.

Executed at a 1:1 scale, the blueprint measures approximately 117 × 83 cm and is printed on original Ferrari watermarked technical paper. The title block identifies the component as "Albero Motore", for Tipo XO/207 E1, Ferrari drawing number 7540390, with associated reference 124823. Material specifications call for nitrided steel (KMV) with a hardness of R95–110 (HB 280–325), reflecting the highly specialised metallurgy required for one of the most heavily stressed components of a Formula One engine.

The blueprint originates directly from the estate of Renzo Medici, who joined Ferrari in 1947 and spent almost four decades with the company, ultimately serving as Head of Parts Production in Reparto Corse. Preserved within his personal archive after retirement, it offers a remarkable insight into the engineering of one of Ferrari's most successful turbocharged Formula One engines and represents an important survival from the marque's Grand Prix history.