The $7 stamp in the middle was issued for the National Commision of Human Rights.
The $7 stamp on the right was issued in 2010 honoring Adolfo López Mateos who served as President of Mexico from 1958 to 1964.
Adolfo López Mateos(1909–1969) was a Mexican politician affiliated to the Institutional Revolutionary Party (PRI) . As president, he nationalized electric companies, created the National Commission for Free Textbooks (1959) and promoted the creation of prominent museums; such as the Museum of Natural History and the Museum of Anthropology in Mexico City. Declaring his political philosophy to be “left within the Constitution,” Lopez Mateos was the first left-wing politician to hold the presidency since Lazaro Cardenas.
The se-tenant stamps were issued in 2010 celebrating 100 years of Aviation in Mexico showing de Havilland Comet IV plane.
The de Havilland Comet was the world's first commercial jet airliner to reach production.Developed and manufactured by de Havilland of Britain, it first flew in 1949 and was considered a landmark in British aeronautical design. After introduction into commercial service, the initial Comet versions suffered from catastrophic metal fatigue, causing two well-publicised accidents.
The Comet had to be withdrawn and was redesigned. The Comet IV series subsequently enjoyed a long and productive career of over 30 years, although sales never fully recovered. The Hawker Siddeley Nimrod, the military derivative of the Comet airliner, is still in service. The original decades-old airframes are being rebuilt with new wings and engines to produce the Nimrod MRA 4, expected to serve with Britain's Royal Air Force until the 2020s, over 70 years after the Comet's first flight.