3 Kr. on dark blue in the horizontal strip of three with complete 13 mm wide margin of sheet below, as postage correct 9 Kr. franking on postal union cover with four ring cancel "220" together with two ring cancel "Frankfurt 7 May 1855" to Erford / Prussia, reverse railway framed 3-line cancel "EISENACH-HALL" and delivery cancellation from 9. 5. 1855, complete letter contents. The unit was torn in lieu of cut, through it touched. Left stamp with vertical letter crease. Another Taxis-Markeneinheit with 13 mm wide margin of sheet is on cover unknown! Certificate with photograph Sem BPP (11 / 2010) "units with so wide sheet margins are unusual and rare. An in fact impressing document. "