It could be a gavia IMO, the only thing that doesnt match the Gavia is that the gavia has a real logo in the front tube not a decal, some pinarello's come with decals in the front tube. Cant see any holes so I assume your came with a decal??

The other thing that doesnt match the Gavia i had is the chroming in the seatstay/seat tube joint area, that cap doesnt have chrome in the gavia i had.

With pinarello is so hard to guess sometimes because besides the geometry all the bikes were identical in colors and chromings