Reassembled resoldering antenna wire and a small spot of hotmelt glue
"strain relief", deliberately leaving out the piezo contact.
Watch returned to non-rc function but button A spring must have been
misplaced and no function. Could reasign London instead of Tokyo and
left in timesetting mode , with flashing seconds.
It later dropped into normal timekeeping mode and could then select RC!
, we'll see if full function returns and then go back inside with more
confidence, to take voltages and play with SM or whatever.