PHOTOGRAVURE:
THAILAND, 1977
Imperforate proof block of four, with all colors removed except black inscription under King's picture and details of Scout badge. (Sheet of 50 printed)
PORTUGAL, 1962
Imperforate with black color inverted. (35 known)
ROMANIA, 1936
Part of design occluded in corner.
INDONESIA, 1968
Orange color inverted. Vertical perforation misaligned with either color.
LITHUANIA, 1938
Scout overprint on 1938 National Olympiad 5c + 5c value printed by photogravure. Shown is progression of color changlings from green to brown due to chemical oxidation of the ink subsequent to printing.
The amount of material shown under each of the various printing methods is in proportion to the number of stamps printed by each method.
