Jaeger LeCoultre Grande Reverso Ultra-thin | Q3208120The name says it all, measuring in at an impressive 7. 2 mm thin (including the carriage and watch case) compared with 9. 2mm of the original. This beautiful and elegant Reverso has a slightly contoured case back making for extremely comfortable wear. As with all JLC watches this watch has undergone a rigorous 1000 (41 days) test before leaving the factory. The case flips over to reveal a blank solid case back appropriate for engraving personalizing.