MEXICO 1800'S EMBOSSED STAMP ON STAMP ON POSTCARD STAMPS ON STAMPS -P17748

México #948 (1963) – A Stamp A Day

Analysing malaria events from 1840 to 2020: the narrative told through postage stamps, Malaria Journal

Analysing malaria events from 1840 to 2020: the narrative told through postage stamps, Malaria Journal

Analysing malaria events from 1840 to 2020: the narrative told through postage stamps, Malaria Journal

1665 - 1976 13c State Flags: Oregon - Mystic Stamp Company

Postage stamps and postal history of Mexico - Wikipedia

Letter addressed stamp hi-res stock photography and images - Alamy

1959 - The Philatelic Institute's Stamp Map of the World - Antique Map – Maps of Antiquity

H.R. Harmer GPN, Inc. Sale - 3057 Page 60