1883-1961 selection of 170+ stamps, overprinted Specimen, Muestra, etc., neatly mounted on 19 exhibition pages, complete for all stamps sent to the UPU, also some Postal Stationery items, v.f. and magnificent display of Costa Rica stamps overprinted Specimen and Muestra (Image)

Est.US$5,000

1922 10c-100p three se-tenant sheetlets of four in green, magenta and brown (representing 12 different values), unused without gum, each stamp with security punch and overprinted "Waterlow & Sons Ltd Specimen", fine-v.f. (Image)

Est.US$150