Los-Nr. 1828

1920, 3 pia. on 6 pa. deep blue block of four, inverted overprint, unused, few perfs apart are hinged, extremely scarce block and important variety of Angora issues, signed (for normal stamps Isfila catalogue value 7.500,- Euro) 

Provenienz: M. Plantinga (C. Gärtner 2014)