The Longines 13 ZN is without a doubt beautiful. All the springs are machined and finished to a very high standard. It was also the first chronograph that could be optionally be offered as a fly back; where you can reset the chronograph feature without stopping first. As an independent watch maker it’s always a risk taking on work like this where no spare parts are available and things can go wrong… This watch is not resetting correctly and obviously needs some attention. After some consideration I decided to work on it as I have never worked on one before…
