Welcome to TFF.
What you have is not a true Flobert, where the only breechblock is the hammer, but the Warnant type, which had a hinged breechblock pivoted at the open holes shown, and missing from your gun. The arms that extended down each side often cracked at the pivot holes.
90% if not 100% of these were made in Belgium ca. 1890s-1914 and if you remove the barrel there will probably be the ELG in oval Liege proofmark.
In condition shown it has no value unless someone wants the stock, etc.
The inventor: http://www.littlegun.be/arme%20belge...ulien%20gb.htm