General
Bulgaria
SC #117
1999; 2008; 2020
Characteristics
126.00 x 70.00 mm
Dark green on ochre underprint.
Signatures
Details
BG.
UV: fibers fluoresce yellow and blue, series of 10 fluoresce yellow at left end.
Front
Face type: Dr. Peter Beron at left, holographic strip at left.
Back
Back type: Astronomy sketches and telescope.
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