Testing (really testing) the Arnold & Son Constant Force Tourbillon (and see if such mechanisms have a chronometric interest)
The watch we’ll test today is worth of a chronometric contest. It has been created with a unique goal in mind: being as accurate as possible, in all positions and during the whole range of its power reserve. Usually, we would have written a review exposing the case, the dial, the finishing or the wearability of the piece. However, with the Arnold & Son Constant Force Tourbillon, this would have been short. We had to test it, and when I mean “test”, I mean looking at it on a watchmaker’s bench, with professional measuring tools. So here we are, with the test (and not the review) of this demonstration piece, and answers about the utility of such complex devices in a watch.
