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Here is an uncommon 1970’s Le Coultre Master Mariner automatic measuring 40x42mmx11.7mm. (1.57×1.67x.45 inches) having a very clean and large “C” shaped stainless steel with screw-back Le Coultre case. The original three colour dial with day/date having quickset feature is quite vibrant and clean. The rotor, automatic winding Le Coultre movement was just cleaned and is accurate.