Bidspirit auction | German Occupation of the World

German Occupation of the World War I - Dorpat - 1918, black surcharges 20pf on 10k dark blue and 40pf on 20k blue and carmine, each one cancelled on a piece with ''DORPAT'' black straight line cancellation, VF, expertized by Z. Mikulski and others, C.v. $320, Mi #1-2, €400, Scott #N1-2