I will try to take a look at these later.
They are written in German.
May I suggest that you take a look at the ViewMate feature of jewishgen for future reference? Not only can you post such images there (and can classify them, such as 'translation -- German' (or 'translation -- other', if you're not sure of the language), but they will be seen by many volunteers who are eager to help with translations. In addition, ViewMate allows for easy rotation of images, which is very helpful for postcards, which often have the writing in at least two directions!
Brooklyn, New York, USA