Composition study for an "Adoration of the Magi (or The Epiphany)" World War II portable altarpiece, with inscriptions and door panels

[left panel above and below emblem in graphite]: We Have Seen / His Star In / The East; [right panel above and below emblem in graphite]: And Are Come / To Worship / Him; [lower left in red ink]: stamped monogram initials; [lower right in red ink]: stamped signature; [bottom left in ink]: Epiphany