I would bet next weeks pay check that is not a Bianchi. I never saw in person nor pics of Bianchi with a S on the stay caps and forks.
It has a Zeta decal "on" it and that is all you know. If they put fake brand decals they can use fake tubing decals.
Any stampings on the dropouts or fork ends?
__________________
“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk