Public auction #37

1907, COUPON R PONSE INTERNATIONAL CUT OUT OF THE UPU ARCHIVES SHEET - ROM DESIGN: International Reply Coupon of »COSTA RICA 12 centimos de Col n«, in a very fine vertical pair with "AUTRICHE 28 Heller" (Austria) I.R.C., this AUTRICHE-COSTA RICA PAIR belongs to the rarest postal stationeries of these countries and is a key item for any exhibition collection. In private hands UNIQUE. (Österreich I.A.S Internationaler Antwortschein)