"Athenes. S.A.R. Le Prince Royal de Grece inaugurant les Jeux Olympiques de 1906", b&w early PPC (Pallis & Cotzias 820), franked with 1l.+2l.+3l.+5l. Olympics 1906 (Hellas 189/192), canc. "ΑΘΗΝΑΙ*22 ΑΠΡ. 1906" (only on 2l.) to Bruxelles, Belgium. The 3 other stamps were cancelled on arrival at Brussels. VF.