Los-Nr. 6564

1920, Ruble surcharges with unframed Z, 5r. on 35k. corrected with inverted surcharge to 10r., unused, a rare "corrected overprint",  this stamp is described and listed in Ashford/Tchilinghirian on page 139. Ceresa describes it on page 126 of his handbook, fine, certificate Berger BPP (2019)