Malaria Philatelists International (MPI)

In 1962, the World Health Organization created a meter cancel for the W.H.O. Regional Office - Americas (Washington D.C, USA). There were FDCs produced with the meter and dated 1962/04/07. This was the proposed issue day for "The World United Against Malaria Campaign" stamps and meters. April 7th was on a Saturday and although the FDCs were cancelled on that day the W.H.O. Regional Office was not open. The first day of real usage for the meter was Monday, April 9th and below are 2 'First Day of Use' Covers:

First Day of Use Covers - Monday April 9th, 1962

1962/04/09, 7 ¢ paying the airmail letter rate to the World Health Organization Liaison Office at the United Nations in New York, New York

1962/04/09, 7 ¢ paying the airmail letter rate to the World Health Organization Office at 405 East 42nd Street in New York, New York

*If any reader has other covers on this day (or before this day), please contact me at malariastamps@yahoo.com