Grouphead Gasket For Some La Pavoni Lever Millennium models OD 62mm ID 52mmm Fits: Most models of Europiccola, Professionale and Stradivari built after approximately Jan. 2000. Some Millennium machines manufactured after approximately March 2008 have the MPN-55 grouphead gasket instead of this MP-55. We recommend inspecting the grouphead gasket on your machine before ordering if your date of manufacture is even close to 2008 dates or if you don’t know the date. (Remove the ABS base and look under the metal base to find the date sticker.) Most machines manufactured between March 2008 and March 2010 have this Version II gasket. After March 2010, it was installed on some machines, but not all machines. Again, inspect the gasket on your machine to determine which version you need. There is a slight difference in diameter, but the main difference is on the vertical outside edge: the MP-55 has a flat outside edge; the MPN has a ridged outside edge (slightly thinner by the bottom, flat edge and wider by the curved, top edge). Please click here to see a close up of the ridge present on the MPN-55. Note that after a gasket has been installed for years, it may be deformed. However, you should be able to tell if there is a ridge or not.