Heinrich Köhler 384 Auction – Day 2 Single Lots & Airmail and Zeppelin Mail – inclusive the collection of the Sieger family

2nd printing, thin laid batonne paper 2 r. rose, diagonal bisect, with 3rd printing imperf. 2 r. green, tied by "FRANCO EN C. GUZMAN" to cover front. Very rare, the only such combination recorded. Certificate MEPSI (1998)