Metzger adduced a nearly completely identical representation in a 13th c. French Christian manuscript, the Psalter of St. Louis, remarking that the figure depicted there is undoubtedly that of Christ. http://kaufmann.mtak.hu/en/study06.htm
Моисей перед Христом, горящем, но несгораемом в кусте (древе?), рядом овцы (не те ли, Гедеоновы?)