Book: Rosenthal, J. William. 1996 Spectacles and Other Vision Aids A History and Guide to Collecting.
• Similar design: pp. 238-9, figs. 423-4Book: Toppler, Joachim. 1988 A Spectacle of Spectacles. 178.
• Similar design: p. 56, fig. Oc15Book: Davidson, Derek C. 1989 Spectacles, Lorgnettes and Monocles. 32.
• Similar objects: p. 10.