The visor is fitted with an unusual reinforce depicting the type of grille defense that might be used on a helmet intended for a tournament with swords or clubs. This suggests it was originally part of a garniture that included exchangeable pieces for battle and tournament use.
The Metropolitan Museum of Art, Stephen V. Grancsay, and Carl Otto von Kienbusch. The Bashford Dean Collection of Arms and Armor in the Metropolitan Museum of Art. Portland, Maine: Southworth Press for the Armor and Arms Club of New York City, 1933. pp. 70–77, no. 7, pls. XV–XVI.