Bulgaria 1928 Airmail - different colors overprints

From Stamps of the World
  • Issue Date: 1928 (never used)
  • Designed by:
  • Print Run : 100,000 each
  • Print Process:
  • Perforations:
  • Stamp Size :
  • Bulgarian Catalog Numbers : 220/22
BG# 220
BG# 221
BG# 222
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