Piston from a distance...

What do the letters CC indicate on the crown of the V50 Mk2 piston? Is it the C piston i.e. the largest oversize as mentioned in the workshop manual?

Guzzi pistons are marked A ,B or C as they are matched to bores, the difference between them is supposed to be a few tenths of a thou. Don’t know about two C’s. The V50 has Nickasil plated bores so rebores wouldn’t come into it.

I suppose I better get off my lardy behochy and measure one. A double C, things that make you go mmmmm.