CH 2001 Stamp Day Basel BS, cover cancelled with franking machine VSPhV 07.12.01 8050 Zürich 50 Oerlikon

Switzerland 2001 Stamp Day Basel BS,
official cover "Moderne Architektur in Basel - Tag der Briefmarke - Journée du Timbre - Giornata del Francobollo - Di dalla Marca Postala- BASILEA 2001 - Offizielle Ausgabe VSPhV / FSPS / FSFS",
cancelled with franking machine VSPhV in red color "07.12.01 "8050 Zürich 50 Oerlikon - BASILEA 2001 - Tag der Briefmarke - 7. - 9. Dez. 2001 - Ausstellung Stufe III",
without address, luxury conservation.