Thanks for the responses guys. The guy who purchased seems okay, he has taken it to his local watch specialist who can’t look at it in detail till tomorrow, but thinks it may be the main spring. If we are lucky, he thinks it may just be disconnected, if unlucky, then it may be broken. So he will have a look tomorrow, if he comes back with a silly quote to fix, Ill just get it sent back to me and Ill take it to the repair shop here. I think the guy really wants the watch, so the deal would probably still be on. Just the cost of shipping, £90 each way :(
Anyone got any experience of cost to replace a main spring on a Rolex Sub? The repair it had along with the service was a bent main shaft or axle I think? So not sure if removal of this would mean disturbing the main spring?