C31 MNH Sheet TWIN-MOTORED TRANSPORT PLANE 50 US Airmail 50¢ Stamps Orange 1941 Updated on January 5, 2024 By admin Comments Off MNH Sheet of 50 Stamps. Transport Plane Series – Orange. Sludge on left bottom selvage. Share Tweet By admin You May Also Like C31 MNH Sheet TWIN-MOTORED TRANSPORT PLANE 50 US Airmail 50¢ Stamps Orange 1941 C31 MNH Sheet TWIN-MOTORED TRANSPORT PLANE 50 US Airmail 50¢ Stamps Orange 1941