Apothecary trebuchet scale in wooden chest

Old balance with apothecary trebuchet in wood glazed chest. Precision balance early xxth. Fb hallmark at the top and back of the trebuchet. Block button. Wooden chest and glass cage. Just missing a finishing wand at the bottom right. Window opening system facing a slide. Drawer with small treasures: A wooden box with weights and precision plates (missing 1 weight), A small round cardboard box pharmacy saint etienne, 3 round weights (large, medium, very small) 2 cups. Height 34.5 cm. 36 X 19 cm. 4 kg.