I think this is an extremely attractive piece, which seems to correspond to 17th century Italian left hand daggers in the blade, crossguard ring and the pierced holes in the grooves of the blade with pronounced central ridge.
What puzzles me, as Paul has noted, is the neoclassical urn style pommel, which I cannot seem to find similar examples of in Wallace Collection, A.V.B.Norman, nor Peterson, at least not exact. Despite that, it still feels 17th century even though that pommel shape seems more in line with the neoclassical spadroons of later 18th c.
Ok Manuel, could you puuullleeeze reveal your thoughts on this dagger?
All best regards,
Jim