"Giacobini" is Léon Giacobini

Rops, from Belgium, sells on 29 January 2017 a "signed Giacobini" watercolour landscape, estimated at 80 to 120 Euro.

This is a work by Léon Giacobini (1813 or 1815-1900), a French aquarellist. His works don't appear on the market very frequently, but are of considerable quality.

A nice comparable work was for sale at Pousse Cornet in late 2015. That one was in a much better condition though. The one for sale now is somewhat soiled and has some damage. Still, it should be worth closer to 500 Euro probably.

UPDATE: sold for 60 Euro, cheap!