my guess is this is Swiss but: 26.6 seatpost would not be typical Aelle, a 26.8 seatpost would be more likely for Aelle but not in METRIC dimensions. If the ODs of the main tubes are even mms then the tubing is metric (but if fractional mms then perhaps not Swiss after all) and a properly fitting 26.6 could make it SL seat tube.
So what's the BB threading?
Are there 5 spiral ridges in the butt of the fork's steerer?
The brake bridge is a commonplace item not distinctive for Battaglin or any certain marque, but the pointed stay ends and fork blade ends sure look "Swiss" to me.