CH 2007 Stamp Day Einsiedeln SZ, postal card, imprint cancelled 9. Dezember 2007 8840 Einsiedeln, addon Sihltal+Sign

Switzerland 2007 Stamp Day Einsiedeln SZ,
official postal card of Swiss Post (postal stationery) 
"Tag der Briefmarke 2007 - Kloster Einsiedeln", Design Beat Kehrli,
with black imprint picture Monastery Einsiedeln,
with printed franking, without address, cancelled "9. Dezember 2007 8840 Einsiedeln - Tag der Briefmarke",
with green addon cancellation "Philatelistenverein Sihltal und Umgebung zu Gast an der Sammler-Börse Zürich 2007",
additional signatures of the club president and initiators, luxury conservation, smallest edition.