CH 1998 Stamp Day St-Blaise NE, cover cancelled 4.-6.12.1998 2072 St-Blaise with add-on cancellation ColombePhilex III

Switzerland 1998 Stamp Day St-Blaise NE,
official cover "Tag der Briefmarke - Journée du Timbre -  Giornata del Francobollo - Di dalla Marca Postala - 98 - Emission officielle VSPhV/USPS/USFS",
with illustration "Les usines d'automobiles à St-Blaise - MARTINI",
with red add on cancellation "Journée du Timbre - Saint-Blaise - 4-6-Décembre 1998 - ColombePhilex III", 
cancelled "4.-6.12.1998 2072 St-Blaise - Journée du Timbre",
back side with arrival cancellation "7.12.98 8708 Männedorf", luxury conservation.