On March 18, 1938, Mexican President Lazaro Cardenas claimed ownership of all foreign oil companies in the country. He then created Petroleos Mexicanos to exclusively control all aspect of the oil's production.
It means "Oil Expropriation" i.e. the government that made your token, coin, etc. seized private companies' oil refineries, etc. and nationalized them.
Carlson Companies was created in 1938.
Huapango - 1938 was released on: Mexico: 30 March 1938 USA: 10 June 1938
La zandunga - 1938 was released on: USA: 17 March 1938 Mexico: 18 March 1938
Rapsodia mexicana - 1938 was released on: Mexico: 30 July 1938 USA: 25 November 1938
La Adelita - 1938 was released on: Mexico: 14 April 1938 USA: 11 October 1938
Alarma - 1938 was released on: Mexico: 27 April 1938 USA: 22 January 1939
Guadalupe La Chinaca - 1938 was released on: Mexico: 8 June 1938 USA: 11 September 1938
Noches de gloria - 1938 was released on: Mexico: 11 February 1938 USA: 22 April 1938
Hombres del mar - 1938 was released on: Mexico: 27 October 1938 USA: 6 November 1938
A lo macho - 1938 was released on: Mexico: 2 December 1938 USA: 2 June 1939
Ojos tapatios - 1938 was released on: Mexico: 10 February 1938 USA: 12 February 1939