Heinrich Köhler Auction 376 - Day 2

The "Admiralty" stamp with manuscript "1 ½", good margins all around with large part of adjoining stamp at bottom, used on folded lettersheet from Constantinople to Broussa with oval "CONSTANTINOPOLI * POSTA DEI PIROSCAFI OTTOMANI P.P" alongside, a fine and attractive cover, certificate du Vachat (2009)
Provenance: The Pasha Collection of Islamic Stamps and Postal History (Spink 2011)
                     depicted in S. Ringstrom and H.E. Tester "The Private Ship Letter Stamps of the World - Part 2" page 118