Does anyone know the exact size of the portafilter to group gasket of any of the Ponte Vecchio machines?
I just found out that their piston seals are interchangeable, as the Riviera piston seals are no longer available.
I need to replace the portafilter gasket on one of my Rivieras that I'm trying to sell.
The measurements of the Riviera portafilter seal I have are:

(OD)55mm x (ID)43mm x (Thickness)5mm

Thanks

The older Riviera groups with the 3 piston V seal configuration is the exact same as the Ponte Vecchio Export. Same portafilter gasket. I have restored 4 older Rivieras.

Nice! Thanks again.
I went to a place called Hannah Rubber in town and will be having some made (in viton rubber) for less than I found them for online. I bought the V seals from 1st line at $10 each. Kinda steep.
Im working on 3 Rivieras at the moment.