Diptych with the Coronation of the Virgin and the Last Judgment – French – The Metropolitan Museum of Art https://www.metmuseum.org/art/collection/search/471975
This diptych is composed of a pair of thick ivory panels. Two modern hinges hold the panels together, allowing them to fold closed like a book and lock by means of a hook and eye latch on their outer rims
Aachener Kunstblätter 31 (1965). p. 20. Kunsthalle Köln.