As docc says, all same ... at least when your Guzzi was crated in Mandello.
Well, unless assembled after a grappa break!
You might find the AWOL original fastener (and other items) in the "cleavage" between the jugs! I lost one or two of the upper ones and found 'em later loitering there.
1921!
Bill
Yes they will fit. My bike has Grisso 2 valve rocker covers. As will the front timing cover gasket which I have also used on my engines both the V11 and the Daytona.
Ciao
My bike is a 5.5 and takes a 180 and I will be switching to 170 for a trial next time. Many riders at my old BMW dealer did that swap, as did I on my R1100s. There is, at least some consensus on the web, that the mfg's addition of a wide tire to many sport-style bikes, was purely for the look.