Hello again Sandydina,
during search for some postal stationeries for my collection, I saw a similar postcard as you showed in your first thread. Now I saw the backside of the card (without cancellation of the word "Drucksache"), but, at first view, cancelled by the post office Hannover 8. You can find the card under the following link (ebay):
http://www.ebay.de/itm/292093684224?_trksid=p2055119.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIThere the front/back:
on closer examination regarding the cancellation I'm inclined to the view that these cards are more a "philatelically gimmick". All cancellations of the postmark Hannover 8 are from the same date (22.5.1900) and they're all placed on printed matters. I could not find other days of cancellations on the "postmark databases", which I use for my researches.
best regards Max