Heinrich Köhler 384 Auction – Day 1 Single Lots: Europe and Colonies, Kingdom of Lombardy–Venetia – The "P.G." Collection

1885 (September 14), 10pa green, perforated 11.5, Type I, Second Printing, two singles affixed to postal card, paying the 20pa rate, tied by Plovdiv c.d.s., to Brussels, Belgium, endorsed “voie de Sofia”, with black Sofia c.d.s. transit struck on front (Sep 15),  attached reply card unused but franked with two additional 10pa green, with 1994 Zagorsky certificate, suggesting that cancellations had been slightly enhanced, and 1994 Karaivanoff letter indicating his view that the differing depths of shade can be attributed to light cleaning to card, both attesting to the card’s overall genuineness, scarce,