JECKER, mechanic, rue des Marmouzets n°42 in Paris. Brass counterweight monetary scale in wooden case. Glued label with conversion table. Late 18th or early 19th century. Length: 16 cm - Open length: 31.5 cm Note: Jecker was one of the first French manufacturers of precision instruments at the end of the 18th century, the market having been a British monopoly until then.