No. 564 - arriving mail art "den Kanal nicht voll genug kriegen" from Heinz W. Lotz (Germany)

No. 564 - arriving mail art "den Kanal nicht voll genug kriegen"from Heinz W. Lotz (Germany) - a faked old postage stamp with a Bismarck portrait on it - it arrived without any valid postage stamp but with the notice of a postage due. Thank you very much.