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

1881 (May 16), cover franked on reverse with two strips of three 10pa black & green, tied to cover from Jambol to Adrianopel by smudged red datestamps, adhesives paying the 60pa foreign letter rate of up to 15g, a scarce usage of the “Post Jambol” c.d.s. in red; with 2022 Hitzler certificate.
 
Note: At the time these stamps were issued, the foreign letter rate was 60pa for letters weighing up to 15g; this included mail to Turkey, as illustrated by this cover. This rate was reduced to 40pa in mid-1882, and mail to Turkey became classed as domestic mail.  This rate remained in effect until the Revolution of September, 1885.  In both Yambol and Plovdiv, red ink was rarely used on mail struck with the Russian-type c.d.s., becoming more common upon the usage of the bilingual hammers in mid-1881.