Left - Fethi Bey, wearing the 1913 early Ottoman pilots (above), showing the blue edged green cloth (matching the uniform tunic) shoulder boards, rather than 1909 officer's shoulder cords being worn.
The Balloon Troop, set up in 1913 (with the first flight test in Yesilkoy on July 23, 1913), operated a Parseval PL-9 (pictured Right - note the nose is painted with a white star and crescent badge ).
 British General Staff. (1995) 1916 Handbook of the Turkish Army. Battery Press, Nashville: 178.
 Ibid. "Part of the VIII Army Corps (Damascus) 'Air Company'."
According to the Aerodrome website the Ottoman Empire entered the war in October of 1914, it had less than a dozen military aircraft.
As Germany began to supply aircraft in substantial numbers (1915 – 1918), the Ottoman markings were changed:
Gotha seaplanes, some two dozen of which were supplied to the Ottoman Empire:
Right - As can be seen in this 1930s picure of a Republic of Turkey Air Force officer, Kamil Bey, who had served in WW1; he wears the WW1 –sized badge on his peak cap, in the 1930s. As well, a later post 1936 version, with star and crescent badge conforming to the 1936 flag law (that established the current pattern for the Turkish national flag), is known. However, it is not known if this is a uniform item or a post-50s produced "collectable".
Below - Wartime example of the Ottoman Turkish pilots' badges, have an elongated iron star, and crescent/wings part-fitting (pictured above), and this seems to be represented more in original photos of pilots in WW1, than the all bronze stumper wings type. And there are one-offs, with high quality enamel workmanship.
There should not be a large number of period badges in existence.
Most comentators, note that examples can be found in a number of varieties, made of bronze, silver, and sometimes zinc.
There is a silver Pilots' Badge with a maker's mark for Paul Meybauer in Berlin (a shield with a crown on top).
The Ottoman Turkish Government suppressed the circulation of gold and silver in 1914, and this effected Medals made from this as well; as the British General Staff's 1916 Turkish Army Handbook notes: "the stock [gold or silver Liakat medal] is now exhausted, and that no more will be issued." (pg 140).
The final point is that many wartime pictures of Turkish pilots, actually show them acually wearing the Imperial German (Prussian) Pilot's badge instead of the Turkish version.
Right - Ottoman anti-aircraft guns at Gallipoli (c.1915).
There has never been any indication as to what type of insignia, the Artillery in the Air Troops wore (if any); and this picture (below) has a close resemblance to the type of insignia adopted by the Germans in WW1 for their anti-aircraft guns: Flak Batteries (illustrated below).
Left - This WW1 Ottoman Fortress Artillery junior officer, wears some unusual insignia combinations: