Lot 60580 – 1931 Airship 50k ERROR OF COLOUR (dark blue instea

1931 Airship 50k ERROR OF COLOUR (dark blue instead brown – the famous “ASPIDKA”) in block of 4, perforation 10 1/2 : 12, watermark horizontal, gum browning at back and traces of stains on front but not detracting from this rarity, mint hinge remainder or traces (2), 2 never hinged One of the most popular stamps of early Soviet philately and a great airmail rarity – in a block of 4 definitely an important exhibition item, Mi 400B(X)b, Standart 276 € 3’200++, Lyapin 341 € 12500