Helgoland, 1879, 1sh & 5sh red & green, numeral essays, on thin card, with matching top selvage, full margins, a Very Fine set, very rare with only the 5sh is mentioned in the relevant literature, this set previous sold at Mohrmann Auctions in 1984 for 3,250DM; with 1984 Bühler certificate. Michel No. 19E-20E  Estimate $2,000 - 3,000. $0 (Image)