Here is my favourite Jump Hour by Sorna a Swiss brand with a BFG158 movement inside. I bought this from a contact I have in the Philippines and it was not working correctly. I found out that the stud & regulator carrier had been clued to the balance bridge and that also the regulator pins were missing. Although the watch ran it would run far to slow. I also noticed that the auto wind rotor would not wind the mainspring.
I was fortunate to quickly find a donor movement BG158 for a low price. Once arrived and examined I soon realised that the Sorna was missing a wheel that drove the autowind mechanism to wind the spring. I fitted the donor and the balance and it has since ran perfectly.
All watches have a dial but I like to think this one has a face! indecently its a second hand that spins in the middle. Many have asked if its a compass.
