20 Pfennig Germania dark violet-blue with red "C.I.H.S." handstamped overprint, in mixed franking with 5 Pfennig Germania (without overprint) and 10 Pfennig, 15 Pfennig, 30 Pfennig and 35 Pfennig Germania each with blue "C.I.H.S." handstamped overprint on "OPPELN" souvenir card, cancelled "OPPELN * 1 i 18.2.20 2-3N", perfect condition, photo certificate Mikulski AIEP, who also notes this is the first genuine example with red overprint he has expertised; major rarity of the Oppeln emergency issues and Upper Silesian philately as a whole - the only card bearing a stamp without overprint, illustrated in the handbook on page 96 / card 6. (Mi.-Nos. 6/7, 10/11, DR 85IIa and 28).