By decret of Executive authority of Argentina in 1913 May 13, resolved that, all stamp used by a Government use a special "Matasello" ( cancel ? )
Was issued this special cancels:
( 1913/1926 )
"M.A" = Ministerio de Agricultura
"M.G" = Ministerio de Ganadería
"M.H" = Ministerio de Hacienda
"M.J.I" = Ministerio de Justicia e Instrucción Pública"
"M.M" = Ministerio de Marina
"M.O.P" = Ministerio de Obras y Servicios Públicos"
"M.R.C" = Ministerio de Relaciones Exteriores y Culto"
Here a essample :
Mariano Moreno 5c
National Heroes and "Riquezas" Series ( Serie Próceres y Riquezas I )
Issued in 1935