Oscar Hainauer [d. 1894], Berlin; his wife, Julie Hainauer, Berlin; acquired 1906 by (Duveen Brothers, Inc., London and New York); by exchange 21 October 1920 to Joseph E. Widener, Lynnewood Hall, Elkins Park, Pennsylvania; gift 1942 to NGA.
- Renaissance and Baroque Bronzes, Milwaukee Museum of Art, Wisconsin, 1989, brochure, no. 7.
- A Collector's Cabinet, National Gallery of Art, Washington, D.C., 1998, no. 105, as Lock Face Plate and Strap.
- A Cabinet of One Hundred & Thirty-Three Bronze Plaques and Medals of the Renaissance Period from the Collection of the Late Herr Oscar Hainauer of Berlin. Ed. Duveen Brothers. London, n.d. (but 1908): no. 20, repro.