This is a waterproof model from the 1950s, equipped with the Jaeger-LeCoultre Caliber P812 bumper automatic movement.
Before the development of full-rotor automatic movements, this valuable half-rotor type bumper automatic Cal. P812 was used. The movement is notable for its high-quality finishing and thick internal components, offering a visually impressive construction. This caliber also served as a base movement for brands like Vacheron Constantin.
The dial features a two-tone design with trapezoidal applied indices and luminous markers, combined with dauphine hands—an aesthetic also seen in vintage LeCoultre models. Its beautifully aged patina gives it a superb vintage character.