Overall (open): 5 1/2 x 5 3/4 x 13/16 in. (13.9 x 14.6 x 2.1 cm)
Overall (closed): 5 1/2 x 2 5/8 x 1 in. (13.9 x 6.7 x 2.6 cm)
central plaque: 5 5/16 x 2 x 13/16 in. (13.5 x 5.1 x 2.1 cm)
Inner Wings L & R: 4 5/8 x 11/16 x 1/4 in. (11.7 x 1.7 x 0.7 cm)
Outer Wings L & R: 5 1/2 x 1 x 1/4 in. (13.9 x 2.5 x 0.6 cm)
The central statuette shows Mary appearing as the Queen of Heaven with the standing Christ Child blessing the approaching Magi on the wings. The right wing focuses on the role of Joseph, who presents the infant Christ to the Virgin, followed by the Presentation in the Temple below.
J. Pierpont Morgan, London and New York (until 1917)
Catalogue of the important collection of early English & foreign silver and silver-gilt plate: Bijouterie and objects of art of Dunn-Gardner, Esq.. London: Christie, Manson and Woods, April 29–30, 1902. no. 60.
Koechlin, R. "Quelques ateliers d'ivoiriers français aux XIIIe et XIVe siècles (premier article)." Gazette des Beaux-Arts, 3rd ser., 34, no. 5 (November 1905). pp. 463–65, ill.
Koechlin, Raymond. Les Ivoires Gothiques Français: Volume II, Catalogue. Paris: Editions Auguste Picard, 1924. no. 142, p. 63.
Koechlin, Raymond. Les Ivoires Gothiques Français: Volume III, Plates. Paris: Editions Auguste Picard, 1924. no. 142, pl. XXXVIII.
Koechlin, Raymond. Les Ivoires Gothiques Français: Volume I, Text. Paris: Editions Auguste Picard, 1924. no. 142, pp. 125,127,128.
Morey, C.R. "Italian Gothic Ivories." In Medieval Studies in Memory of A. Kingsley Porter, edited by Wilhelm R. W. Koehler. Vol. I. Cambridge, Mass: Harvard University Press, 1939. no. XVII, p. 193, fig. 15.
Gillerman, Dorothy, ed. Transformations of the Court Style: Gothic Art in Europe, 1270 to 1330. Providence: Museum of Art, Rhode Island School of Design, 1977. no. 16, pp. 56–57, ill.
Schwartz, Sheila. "St. Joseph in Meister Bertram's Petri-Altar." Gesta 24, no. 2 (1985). p. 148, fig. 4.
St. Clair, Archer, and Elizabeth Parker McLachlan, ed. The Carver's Art: Medieval Sculpture in Ivory, Bone, and Horn. New Brunswick, N.J.: Jane Voorhees Zimmerli Art Museum, Rutgers University, 1989. no. 11, pp. 39–40.
Randall Jr., Richard H. The Golden Age of Ivory: Gothic Carvings in North American Collections. New York: Hudson Hills Press, 1993. p. 52.