Hi Colin, i think you will find there are a number of forum members that can repair Synchronars, the problem is whether yours is repairable and if someone with the required expertise is willing to repair it (if possible) From what i can ascertain, the repairs are very time consuming due to the original sealing process employed requiring probably more expertise than any other led i can think of, and also a sprinkling of luck :D It also appears that the majority of remaining watches are non-working. There has been talk on this forum in the past of retrofit modules etc, but as far as i am aware nothing as appeared as of yet. Good luck with your endevours, a working Synchronar is a great thing to own, i certainly wish i had one
