1 / 30 thaler black on blue, horizontal pair - left stamp in type I and right stamp in type III, large margins all around with two blue one-line cancel (of it one turning into) on cover with additional blue box cancel of 2 lines \"Oldenburg 3 / 7\" (1858) to Carolinensyhl, superb in every respect (choice copy), photo expertize Stegmüller BPP: \"originally and fine, faultless condition, unrepaired. Type pairs are on Gem rare. \", Michel 1.500.-