CH 2004 Stamp Day Dietikon ZH, postal card used as a maximum card cancelled 12. Dezember 2004 8953 Dietikon

Switzerland 2004 Stamp Day Dietikon ZH,
official postal card of Swiss Post (postal stationery) 
"Tag der Briefmarke 2004 Dietikon - Energie aus Wasserkraft -
Journée du timbre-poste 2004 Dietikon - Enegie hydraulique -
Giornata del Francobollo 2004 Dietikon - L'acqua, fonte di energia -
Stamp Day 2004 Dietikon - Hydroelectric power",
with printed franking, without address, unused (mint MNH),
used on the front as a maximum card with a matching special stamp for Stamp Day 2004 (SBK 1139, Michel 1896),
cancelled "12. Dezember 2004 8953 Dietikon - Tag der Briefmarke", luxury conservation.