Here are two links to Ian Holm's website:
3./Flieger Ersatz Abteilung 16:
http://www.ww2.dk/ground/infanterie/fliegrs.html
10.(See)/Lehrgeschwader 2:
http://www.ww2.dk/air/lehr/lg2.htm
From these links, I'd say the photos of 10. (See)/LG2 must be within the time frame November 1938 to October 1939, and therefore, like the photos of the Flg.Ers.Abt., pre-war.
All the best,
Karl