Rare, small chart of Constantinople (Istanbul) and the Bosphorus, published in London by John Luffman.
The map differentiates Constantinople, Ejup, Haskoi, Pera, Tophana, Galata, and Scutari. Various forts, towers, and other landmarks are also illustrated.
The text at the bottom notes:
Canal of Constantinople. The Bosphorus of ancient Trace communicates with the White and the Black Seas. The Port or Harbour of Constantinople is formed out of the Gulf of Cheratus and is capable of holding One Thousand Ships. The City is in Lat. 41.4 N. Long. 29.20 East from London.