Unknown German, ‘Diptych with Scenes of the Annunciation, Nativity, Crucifixion, and Resurrection’, 1300–1325, The Metropolitan Museum of Art

made in probably Cologne, Germany; overall (opened): 2 3/8 x 3 3/8 x 5/16 in. (6.1 x 8.6 x 0.8 cm); overall (closed): 2 3/8 x 1 3/4 x 1/2 in. (6.1 x 4.5 x 1.2 cm)
http://www.metmuseum.org/art/collection/search/469858

About Unknown German