1910 Centenary of the Republic, 50c carmine and black, center inverted. Only 50 printed,
1917 San Martin, 20p blue and claret, center inverted Only 50 issued, all off centered
1920 5c gray blue, usual evenly toned gum, well centered, pencil signed,
The piece of 1925, surcharge inverted error Chinese stamp copy was sold for as much as 276,000 USD at a Cherrystone event.
This is another 1923 blue-green piece with surcharge inverted error. sold at a Cherrystone event in 2010 for US$.172,500.