Auction Series 257-264 in Zurich Day 4

Coastal Ships - Helsingfors Area - Skärgårds Trafik Aktiebolag (STAB) 1873/86: 10 penni deep reddish-orange, blue & black, serpentine roulette 10½, a complete unused sheet of twenty-five subjects (5 x 5), slight inclusion on roulettes at top and marginal fault and whilst the sheet has near full gum the roulettes are fragile at edges and it would probably be safer to leave the sheet on the card display. Rare and most attractive.
Catalogue 261: Stamp Issuing Steamship Companies