LINK:
https://news.abs-cbn.com/news/multimedia/photo/03/16/21/philpost-launches-1734-murillovelarde-map-stamp

PhilPost launches “1734 Murillo Velarde map” stamp
March 16, 2021

A Philippine Postal Corporation employee shows a 200mm x 220mm stamp of the 1734 Murillo Velarde map – the first scientific map of the Philippine archipelago - at the PhilPost office in Lawton, Manila City on Tuesday. The 300-year-old map was used in the Hague proceedings to establish the territorial integrity of the West Philippine Sea. The stamp, titled "Murillo Velarde 1734 map-Carta Hydrographica de las Yslas Filipinas, Manila 1734," is available at P150 each.