A recent ‘discovery’ in the Islamic collection in Rare Books and Special Collections, is a set of Ottoman-French postcards named Medjmouaï teçavir (Collection de costumes). There are 22 postcards with each image portraying a different cultural aspect of Ottoman customs and dress attire. Unfortunately, there is no date on the cards themselves but we can assume these date from the late 19^th or early 20^th centuries.For further reading on Ottoman costumes, have a look at:

Salman, Fikri. 2012. Türk kumaş sanatı. Erzurum: Atatürk Üniversitesi, Güzel Sanatlar Fakültesi.

Fenerci Mehmed. 1986. Osmanlı kıyafetleri: Fenerci Mehmed albümü = Ottoman costume book. İstanbul: Vehbi Koç Vakfı.

Hamilton, Alastair. 2001. Arab culture and Ottoman magnificence in Antwerp’s Golden Age. London: Arcadian Library.

Sevin, Nureddin. 1973. On üç asırlık Türk kıyâfet târihine bir bakış. [İstanbul]: Devlet Kitapları.

Yılmaz, Hale. 2013. Becoming Turkish nationalist reforms and cultural negotiations in early republican Turkey, 1923-1945. Syracuse, New York: Syracuse University Press.

As well as: http://www.midafternoonmap.com/2014/02/ottoman-hats.html