Auction Series 257-264 in Zurich Day 4

Coastal Ships - Borgå Area - Borgå Ånfartygs Aktiebolag 1893: Lithographed Helsingfors 25 penni blue, Type V, a used example on 1908 cover to Pörtö, Sandviken, uncancelled with remnant of where the envelope (which has full original contents) was attached top a small parcel. Illustrated in Dr. Connell 'The Letter and Parcel Stamps of the Finnish Shipping Companies' on page 119. Small ink run at right of stamp of negligible importance given that this is the sole recorded usage on cover. Unique.
Catalogue 261: Stamp Issuing Steamship Companies