Farsettiarte, an auction house known for 20th century art and design, will be offering a drawing attributed to Mantegna in an 8 November sale in Prato. Maddeningly, the lot can’t yet be viewed online. However, ArtsLife and Art Daily provide images and details. Here are images of the drawing:Just below are too small images of the Mantegna drawing at Brescia, which the above sheet is being compared to. The writing is apparently the same, and both versos share red wax dots used for affixing the works into an album. The Farsetti dots are barely visible.
And here is the British Museum drawing:
David Ekserdjian helped Farsetti with the catalogue entry and is writing an article on the drawing.