Los 164
Postage due proof of the border key die in black on glazed card (92x60mm), ex. De la Rue archives, endorsed "REQN. 339" at upper right and "15.11.32" at lower left (Van der Molen p. 341), a very rare item. Provenance: "Africa in Switzerland" sale Robson Lowe Basel 1976 and Peter van der Molen
