No, that cannot be Düsseldorf because the state of Hessen is legible. Düsseldorf does not lie in Hessen.
Interesting note: "Dorf" is the german word for "Village". There are hundredsof places with a name that ends in "Dorf" in Germany.
Now to the identity: It could be one of the following:
Bad Sooden-Allendorf, Allendorf (Eder), Allendorf (Lumda), Frielendorf, Amdorf, Friedrichsdorf, etc.
There is too many to list....
The second Stamp seems to say "Mittelpunkt der..." Which is translated as: "Midpoint of..." below that you can read "Ostmar...". I think it says "Ostmark", which was the name of Austria under the 3rd Reich, until 1942.
Austria was annexed starting March 12th, 1938. Your Stamp has a date of either 15.3.38, 16.3.38 OR 18.3.38. (Or the same numbers in the 20s)
This means your Stamp was cancelled within less than a week to less than 2 weeks of the Annexation. I dont know how this impacts its value...
THere has been a Discussion about "Ostmark" before on here: http://goscf.com/t/50874
Unfortunately the third stamp is too faint with an unfortunate combination of colors. I cannot make it out.
Hope this was helpful!