Indicium CO

Bulgarian envelopes featuring Indicium CO (Michel catalog), issued in the period 1983-91.
The colors are cyan-blue or dark green.
Centenary of the Bulgarian State Railways
Bulgarian Envelope of 1986 overprinted in 1988 / unused / Michel #U 1052..
1.68€
Centenary of the Bulgarian State Railways - Varna Station
Bulgarian Envelope of 1986 overprinted in 1988 / unused / Michel #U 1056..
1.68€
Fungi I - Leccinum aurantiacum
Bulgarian Envelope of 1988 / unused / Catalog #BG-MU-88.01 Image: Leccinum aurantiacum, commonly k..
1.68€
Fungi I - Russula vesca
Bulgarian Envelope of 1988 / unused / PR Catalog #BG-MU-88.04 Image: Russula vesca, commonly known..
1.68€
National History Museum - Sofia
Bulgarian Envelope of 1988 / unused / Catalog #BG-VW-88.a.03..
1.68€
25 Years Vocational School D. Ganev - Silistra
Bulgarian Envelope of 1989 / unused / Michel #U 1130..
1.53€
National Palace of Culture - Sofia
Bulgarian Envelope of 1989 / unused / Catalog #BG-VW-89.02..
1.48€
Fungi II - Calocybe gambosa
Bulgarian Envelope of 1990 / unused / PR Catalog #BG-MU-90.07 Image: Calocybe gambosa, commonly kn..
1.68€
Fungi II - Cerioporus squamosus
Bulgarian Envelope of 1990 / unused / PR Catalog #BG-MU-90.08 Image: Cerioporus squamosus or Polyp..
1.68€
Fungi II - Cortinarius caperatus
Bulgarian Envelope of 1990 / unused / PR Catalog #BG-MU-90.04 Image: Cortinarius caperatus, common..
1.68€
Fungi II - Cortinarius praestans
Bulgarian Envelope of 1990 / unused / PR Catalog #BG-MU-90.11 Image: Cortinarius praestans, common..
1.68€