Switzerland Zumstein SBK Xa **

¥ 124,563.25

Switzerland
1913, 50c Journée Valaisanne d’Aviation semi-official airmail

unmounted mint, depicting a monoplane in flight, fresh bright color, superbly-centered, a choice example of this scarce stamp, extremely fine; with 1992 Renggli certificate. (SBK Xa)

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