Bilateral - Balance or scale - Brass - postal scale

Vintage postal scale “Bilateral,” a classic precision instrument primarily used to weigh letters and determine the necessary postage.

Context: These scales were commonly produced by the German firm Ph. J. Maul (or Jacob Maul), a benchmark brand in precision instruments since the late 19th century.

Bilateral Mechanism: It is characterized by a double pendulum or counterweight system that allows measurements in two distinct weight ranges simultaneously.

Double Scale: The unit in the image features two dials:
- Upper Scale: For heavier weights, reaching in this model up to 250 grams.
- Lower Scale: For greater precision with lighter weights, with a range up to 60 grams.

Materials: They are typically made with a polished or gold-plated brass frame, mounted on a base of lacquered metal or black enameled iron.