1856-1968 Mint and used selection with a good range of early issues, 1915-17 1p centre inverted mint, 1914 "Gobierno Constitucionalista" overprint on 1899 15c mint (S.G. CT51), 1934 Air 20c slate error of colour (just one sheet of 50 printed, Scott C62a, unlisted by S.G.), etc. (100s). Photo on Page 164. (Image1)