60 Kopek registered postal stationery envelope with the overprint "Pleskau / 60 kop", black handstamped overprint, with additional postage Pleskau Mi No. 11 y, cancelled with stamp "PCKOB * K * -4 2 42" and "PCKOB * a * -4 2 42", enclosed receipt for registered mail No. 955, the postal stationery envelope is overfranked, excellent condition, photographic finding Robert Brunel VP (2025) "The condition is flawless".