The Master Ultra Thin collection is Jaeger-LeCoultre at its purest. Thin and dressy watches might not be in vogue anymore, but this hasn't stopped JLC from creating a beautifully balanced design that wears perfectly on any wrist. The watch features an in-house calibre with a gold rotor, which undergoes JLC's signature 1000-hour testing process to ensure that it meets the accuracy standards expected of a watch from the company known as 'the watchmaker's watchmaker'.