Hi...
Yes, the Junkers is a W34... judging from the unit emblem, this example operated with Flugzeugführerschule A/B 113.
You can get a better idea of the emblem from this link:
http://chrito.users1.50megs.com/_dat...mblemsmain.htm
Select 'unit emblems on aircraft', then 'miscellaneous symbols' category, scroll to second last line, left-hand side.
The Arado's unit emblem is a little 'fuzzy', but looks something like that of 1.Staffel, Küstenfliegergruppe 706... see same link as above, but under 'fish... (etc)' category.
Regards