In this episode, we will be deconstructing a vintage Vacheron Constantin pocket watch from 1949, a World Time Pocket Watch to be precise.

It had been a while we didn't produce such a video and we really love making them with our good friend Peter. They are always really interesting and instructive and of course something one should avoid trying by oneself!

We're returning for some proper UNBOXING, but this time we have a little surprise as we will develop with our good friend Peter Speake on the characteristics of the very clever Spring Drive movement.

The timepiece featured in this video is the limited edition to 700 pieces of the Professional Diver's 600M in which is encased the very latest version of this movement called the Calibre 9AR5. It's thinner, holds more power reserve and is more accurate, as simple as that and is part of the brand's 60th Anniversary series of new watches.

n today’s video we compare two different approaches illustrating the constant force mechanism and we not only do so with our good friend Peter Speake but with two great timepieces coming from Ferdinand Berthoud and the second one from Arnold & Son. Peter comes back on what is constant force and details with us how it has been expressed differently on these two timepieces.