1909 (ca), Official Telegraph Administration PCP OVERPRINT on 50 St (ONLY 400 ISSUED) tied by SOFIA cds to Official registered cover (for mailing back the AR receipt for a telegram) to Berlin. The cover with small unremarkable vertically crease in the middle, the stamp is not affected. ONLY FEW COVERS ARE KNOWN. These stamps are described in the Kohl Handbook on page 570, our example is catalogued as Nr. 1 and they are not known in mint condition.