Hmm dogfather, could you specify what is written on the back of your German Tuck's oillette, in German that is? I have found often times that whole long slew of words written on the back of a German postcard is just the name of the company that made it, and if that be the case you can just type it into google, whole kit'n'kaboodle, and get helpful info...in English!:) Also, know a little German maybe I coud help.
And I'm a little confused, didn't Tuck, like most English postcard companies publish in Germany mainly before WWI? I thought that dated them and Gave them more value because it gave a clue as to their age?
But maybe it doesn't apply to oillettes.
CM