including Leage of Nations Disarmament * (Zst: 36-41) and Postage Due 20 centimes blue on granite paper * (Zst: 11N) both with Jean-Claude Marchand 2020 certificates. In addition Airmail 15 centimes - 1 franc in blocks of 4 ** (Zst: 3-12) in special booklet En souvenir de la première conférence sur la post aérienne LA HAYE septembre 1927