5 piastre on 1 Mark Reichspost dark carmine red, overprint "A topless serif", clear prescribed used with two strikes of the single circle "Constantinopel 28 / 8 01 10-11 V", one of the rarest stamps of all issues German international post offices abroad and colonies, in the last 5 years could we none auction offerings of this stamp to enter, in the long run seen unique possibility to the purchase this rarity! Unsigned, photo expertize Jäschke-Lantelme BPP (24.09.2018) : "the stamp shows deep rich colors, normal perforated and shows except for a light perf left at the bottom no further defects. Pieces of evidence this hue are very rare and so far only in few copies proved