The Memovox Polaris was an exceptionally large watch for the 1960s, measuring 42 mm, and benefitted from a remarkable water resistance, to a depth of 200 metres. The watch was fitted with a patented Compressor case: a spring-loaded compression system ensured such water resistance thanks to a flat rubber gasket maintained under permanent tension. This system was particularly useful as it meant that the further down the diver went (and the water pressure increased), the more resistant the case became.

The Collectibles book is an incredible in-depth look of Jaeger-LeCoultre’s watchmaking history as it is the first time such detailed information on key 20th-century models has been brought together in a single volume. Written by the experts within La Grande Maison, it covers the period from 1925 to 1974, surveying 17 of the most significant models produced by the Manufacture. Impressively exhaustive, the book features detailed background stories as well as informative photography and historic documents from the Manufacture’s archives.