Postal History Seminar in Zürich 25/26th July, 1992

To celebrate the 50th issue of the Swiss periodical POSTGESCHICHTE, the publisher and editor, Mr. Hans R. Schwarzenbach invited postal historians from Switzerland and the rest of Europe to a Summer Meeting in Zürich on 25/26th July 1992. I was present at this meeting.
The programme contained a work-shop on basic elements in analysing postal history items. This work-shop was conducted by Dr. Joachim Heibig and was centered on trans