France, 1900, Merson, 50c bister brown & lavender, with "Postes Serbes" control handstamp tying to registered to Geneva, Switzerland, with 1917 Corfu origin cds, registry handstamp and censor markings, receiving backstamp; cover slightly reduced at left, Very Fine. Maury No. 120. Scott No. 123  Estimate $200 - 300. $0 (Image)