Keywords:
collection,
stamp,
picture,
communications,
postage,
mail,
post,
postmark,
label,
zigzag,
canceled,
mark,
philately,
perforation,
correspondence,
retro,
vintage,
USSR,
soviet,
Russia,
exhibition,
Expo,
Brussels,
pavilion,
flag,
banner,
building,
front,
red,
gray,
yellow,
architecture,
symbol,
socialism,
city,
town,
science,
progress,
technological,
research,
discovery,
attainment,
achievement,
cultural,
culture,
history,
tourism,
travel,
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