CH 1941 Stamp Day Zurich ZH, association card with imprint Tag der Briefmarke cancelled 7.XII.41 Zürich

Switzerland 1941 Stamp Day Zurich ZH,
association card "1890-1940 - Verband Schweiz. Philatelisten-Vereine - Union des Societétés philatéliques suisses - Unione della Società filateliche svizzere",
50 Years Association with Coat of Arms, with imprint "Tag der Briefmarke - Briefmarken-Ausstellung - im Kasino Bern - 6./7. Dezember 1941",
with Pro Juventute stamps, cancelled "7.XII.1941 Zürich - Schweizer Tag der Briefmarke", luxury conservation.