Thailand: 1883 First issue 1 solot deep blue from plate III, top right marginal
Thailand
1883 First issue 1 solot deep blue from plate III, top right marginal corner block of four, mint never hinged (bottom pair) resp. hinged (top pair), central vertical perforation between partial separated, fresh and fine. H. Osper certificate.
Condition: block of four/** (mint never hinged...