The World Confederation of Organizations for the Teaching Profession (WCOTP) , composed of organizations representing 3 million teachers, held its 5th annual conference in Manila and Baguio City from August 1 to 8, 1956. To commemorate the event, the 5c Pilar definitive stamp overprinted "WCOPT CONFERENCE MANILA" was issued on August 1, 1956.
(The WCOPT merged with the International Federation of Free Teachers' Unions in 1993 forming Educational International.)
First Day of Issue Cachet
First Day Covers