373rd Heinrich Köhler auction - Day 1

1875, First printing 10 cents black on greyish green-blue and dark-yellow, fresh colour and good perforation (two blunt perfs of no importance), with cleary inverted embossing, used with clear mute 5-ring canceller, a very rare stamp with only one other copy known, signed Bolaffi and certificate Möller BPP (2002)