Lot 51058 – 1902 3c, 5c and 6c, plus 1944 4c, in strips of four, overprinted « SPECIMEN » and Spanish « Spécimen »

1902 3c. green and carmine/yellow, 5c. dull purple and black on buff and 6c. purple and carmine on red in strips of four, overprinted « Specimen », with additional Spécimen (Spanish) diagonal receiving handstamps, also 1944 4c. purple and carmine/yellow, (distributed in unused condition by the UPU) in a vertical strip of four with the same Spanish overprint, some faults and soiling though a very rare group with the additional handstamps possibly applied in Bolivia.