Lot 30195 – 1924 Dr Eckerlin’s Rotary Press sample sheetlet showing two KEVII 1d

1924 Dr Eckerlin’s Rotary Press sample sheetlet printed in black on ungummed, watermarked paper showing two KEVII 1d (larger than the issued stamp) as well as a Russian 1913 7k Romanov, produced in the hope of selling this rotary press process (developed by Herbst & Illig) to the British and Russian Post, unusual, incl. photocopy of cert. RPS for a similar item for reference