Netherlands Antilles B32
Norman Fox writes in
The Carto-Philatelist for November-December 1957 (Vol. 3, No. 6,
p. 82), "...the stamp includes within the boundaries of British
Honduras a big slice of the Mexican state of Quintana Roo. The actual
boundary between Mexico and British Honduras is the Rio Hondo. The
designer of B32, however, has set the border as a line curving north
and east from a point near where the western boundary of British
Honduras strikes the Rio Hondo to Bahia del Espiritu Santo."
Also, Bonaire is further from Curaçao than it appears
on the map on the stamp.