ChinaSerbia 1918 Registered Military Mail Envelope
cover to Switzerland bearing French Merson Yvert 120, 50c brown and Yvert 137, 5c green and Yvert 138, 10c red tied by Tresor et Postes 504 datestamp with handstruck cachet and boxed Serbian Censor in violet, routed via Sector Post No.999 (Corfu) with transit endorsement and Leysin arrival. Very attractive. (pt)
