While often referred to as a "Flobert", Flobert hammers acted as the breechblock, when the hammer was dropped/fired.
Your rifle, made by whomever (there may be proofmarks stamped in the metaL under the stock), is based on what's called the "Warnant" action - with the hinged breechblock much like a Trapdoor rifle.
IIRC, they were made in Belgium (mostly), around the turn of the 20th Century (1900), to serve as "parlor rifles" in some circumstances.
Since they're curios that shouldn't be fired, most that aren't tomato stakes generally change hands in the $125 range, AFAIK.
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