The book I have shows a picture of something very close to this.
" Warnant; L & J. Warnant Freres, Hognee. 9-11mm, five or six shot
This gun has a Francotte type locking latch on the left side of the frame.
But others have had them both on the sides of the breech. The upper rear
portion of the grips usually has a characteristic protrusion. Spent cases were
ejected simultaneously when the breech was opened. Late 1800's.
Hope this helps